Darwinism vs.the real world XXVIII

Understanding Temperature: Cold-Blooded versus Warm-Blooded Animals
Howard Glicksman

Editor's note: Physicians have a special place among the thinkers who have elaborated the argument for intelligent design. Perhaps that's because, more than evolutionary biologists, they are familiar with the challenges of maintaining a functioning complex system, the human body. With that in mind, Evolution News is delighted to offer this series, "The Designed Body." For the complete series, see here. Dr. Glicksman practices palliative medicine for a hospice organization.



Among the other dynamics of nature, the body must contend with heat (the transfer of energy from one object to another) and temperature (the random motion within an object or its internal energy). The body's core temperature is directly related to how much heat it produces through metabolism, the sum total of all of its chemical reactions. The human cell is able to harness only about one-quarter of the energy released from the breakdown of complex molecules like carbohydrates, fats, and proteins. The remaining three-quarters is released as heat into the body. As with any working machine, the more active the body, the more heat it releases.

In addition to the heat released by its metabolism, the body's core temperature is also directly related to how much heat it loses to, or gains from, its environment. Sit directly in the sun on a tropical island and your body will quickly gain a lot of heat. Go out at night on the frozen tundra wearing just a T-shirt and jeans and your body will quickly lose a lot of heat. The body must take control of its core temperature because if it isn't just right, it can adversely affect enzyme function and the integrity of the plasma membrane and other cellular structures.

In my last few articles, I've shown that the body's normal core temperature is set by the hypothalamus at 97o- 99oF (36o-37oC). Studies indicate that this temperature range is the one in which the enzyme systems of the body work best. Thyroid function contributes to the core temperature by setting the basal metabolic rate (BMR), which is how much heat the body generates at complete rest. But life is a dynamic process where to survive the body must stay active, releasing more heat while living within an environment where temperatures fluctuate. The hypothalamus receives data from the central thermoreceptors and keeps the core temperature at its set-point by using both voluntary means (shedding or donning clothing) and involuntary means (shivering or sweating).

These irreducibly complex systems use their natural survival capacity to keep the core temperature right where it should be so the enzyme systems within the cells can work at peak efficiency. Clinical experience teaches that if our earliest ancestors could not have kept their core temperature within the normal range they never could have survived long enough to reproduce. Since humans, like other mammals and birds, can control and keep their core temperature relatively high through internal processes, scientists consider them warm-blooded. In contrast, the core temperature of most insects, amphibians, reptiles and fish is dependent on their surroundings and so they are considered cold-blooded. This article will look at what it means to be cold-blooded and warm-blooded and what might be required for one to develop into the other as evolutionary biologists claim.

Humans, like birds and most mammals, are able to regulate their core temperature at a level that is usually above their surroundings, and sometimes lower than it as well. They accomplish this through increasing their cellular respiration and releasing more heat from their metabolism, altering blood flow in the skin, sweating, panting, shivering, and releasing heat by breaking down fat. In this way they are able to control their core temperature from within. They are therefore called endotherms (endo = within + therm = heat). Since they can keep their core temperature relatively stable, they are also known as homeotherms (homeo = same). The increased need for energy to accomplish this type of thermoregulation requires a high resting metabolic rate, so these organisms have a tachymetabolism (tachy = fast + metabol = to change). In general, birds and mammals are endotherms and homeotherms with a tachymetabolism and are called warm-blooded.

Most insects, reptiles, fish, and amphibians, are not able to maintain a regular core temperature from within, and are therefore more dependent on the temperature of their surroundings. They are therefore called ectotherms (ecto = outside + therm = heat). Since their core temperature is quite variable, they are also known as poikilotherms (poikilo = varied). In order to live within these temperature guidelines, these creatures do not need to provide themselves with as much heat energy as those that are warm-blooded. These creatures tend to have a lower resting metabolic rate or bradymetabolism (brady = slow). In general, insects, reptiles, fish, and amphibians are ectotherms and poikilotherms with a bradymetabolism and are called cold-blooded.

There are advantages and disadvantages to being either cold-blooded or warm-blooded. In particular, since the efficiency of chemical reactions in the cell is dependent on the core temperature, being warm-blooded allows for more activity in colder environments. Warm-blooded animals are, in general, able to forage for food faster and defend themselves better in a wider temperature range than cold-blooded animals. Additionally, warm-blooded animals can support highly-complex energy-dependent organs like the mammalian brain.

However, to maintain a core temperature that is often far higher than its environment, warm-blooded animals must use more of the energy they obtain from food as heat. This means that warm-blooded animals require much more food (often about five to ten times more) than cold-blooded animals to survive. Compared to cold-blooded animals, warm-blooded ones are nature's equivalent to the gas-guzzling and energy-inefficient automobile, since they use so much energy to maintain their core temperature to keep their organ systems working properly. Cold-blooded ones are eco-friendly, energy efficient, and more in tune with their environment because they don't need to use up as much fuel to keep their organ systems working properly.

Conventional scientific wisdom says that warm-blooded animals evolved from cold-blooded ones. Little else is said about how this evolutionary development could have taken place or what viable transitions between these two steps would look like. Converting a cold-blooded animal into a warm-blooded animal would be like converting a Model-T Ford into a Lexus. Instead of cranking the engine to start, sitting in a drafty vehicle, and moving in a herky-jerky motion from shifting gears, the modern driver electronically starts the engine from a distance, sits comfortably in a climate-controlled airtight vehicle, and enjoys smooth acceleration from the automatic transmission.

An Exercise in Critical Thinking

The more you understand what it takes for life to survive within the laws of nature, the more you realize how inadequate and simplistic the theories of evolutionary biologists are. Imagine an exercise in critical thinking: Given the facts of current biology, determine the challenges that face evolutionary biologists in explaining how cold-blooded animals evolved into warm-blooded ones. Consider these three questions and responses for the exercise.

(1) Whether cold or warm-blooded, all life forms, even bacteria and amoebae, have some sort of thermoregulatory mechanism. Since temperature is one of many physiological parameters that must be controlled to maintain life, shouldn't evolutionary biologists have to describe each of these thermoregulatory mechanisms and how they became more sophisticated?

Each of these thermoregulatory mechanisms requires that the organism sense the change in temperature, decide what needs to be done, and then effect an adequate change in function to correct the situation. For example, when the core temperature of warm-blooded animals drops below the set-point, they can automatically increase their production of heat while at the same time limiting heat loss. Most cold-blooded animals, on the other hand, can only get warmer by lying out in the sun. How could such an irreducibly complex system have evolved while remaining functional and allowing for survival?

(2) One of the main differences between warm-blooded and cold-blooded organisms is that the former can generate more heat from their metabolism than the latter. It is important to note that when cold-blooded animals increase their level of activity, they give off more heat just like warm-blooded ones do. The key difference between them is that, in general, whether at complete rest or with activity, warm-blooded animals tend to give off more heat than cold-blooded ones. Wouldn't you think that in trying to show how cold-blooded animals evolved into warm-blooded ones, evolutionary biologists would first need to explain the mechanism behind this phenomenon and the changes that must have taken place along the way?

In fact, it appears that not only do the cells of cold-blooded organisms have fewer mitochondria and so release less heat through cellular respiration, but the process of cellular respiration seems to be different as well. In the last few decades, scientists have shown that there are uncoupling proteins (UCPs)within the cells of most organisms, which, particularly in warm-blooded ones, seem to reduce the amount of energy their cells store as ATP and cause the release of more heat. Although thyroid activity is present in most invertebrates and vertebrates, it would appear that one of its unique functions in warm-blooded animals is to activate these UCPs and increase the production of heat. The production and control of thyroid hormone is irreducibly complex and requires natural survival capacity because having too little or too much of it is incredibly harmful. This is a second very important point that should be addressed by evolutionary biologists before claiming to understand how cold-blooded animals evolved into warm-blooded ones.

(3) If, to keep the enzyme systems that make up the metabolism in their cells working at peak efficiency, warm-blooded animals must maintain their core temperature within a certain range to survive, how do cold-blooded animals stay alive at these lower temperatures? In other words, before claiming to know how cold-blooded animals evolved into warm-blooded ones, don't you think evolutionary biologists should address this other obvious difference in basic cellular function?

It appears that, when it comes to very important metabolic reactions, most cold-blooded animals have several different enzyme systems in place that are able to work at different temperatures to allow for survival. This means that, in general, when it comes to the genes that code for important metabolic processes, the cells of cold-blooded organisms usually have more than warm-blooded ones. This would mean that while cold-blooded animals were evolving into warm-blooded ones they would have been removing the genes for these various important metabolic processes at each step along the way. How the intermediate organisms could have survived during this transition -- involving a loss of metabolic flexibility and the development of increased heat production along with thermoregulatory control -- is another conundrum that evolutionary biologists need to address.

As biologist Ann Gauger has pointedly noted here at Evolution News, "Evolutionary biology's explanatory power is inversely proportional to its rigor." I maintain that if thoughtful adults were educated not just about how life looks, but how it works to survive within the laws of nature, views about evolution would look very different from how they do today.

Is Darwinism playing with loaded dice?

Evolution Appears to Converge on Goals -- But in Darwinian Terms, Is That Possible?
Denyse O'Leary 

Very different life forms frequently converge on eerily identical patterns of development (convergent evolution). That is odd if evolution is purely undirected and unplanned. There isn't enough time, given the history of the universe.

And, as I've noted before, the welter of data coming back from paleontology, genome mapping, and other studies are changing paleontology from a discipline dependent on grand theories to one more like human history, dependent on identified facts.

A century or so ago, British anatomist St. George Mivart noted that Darwin's theory of evolution "does not harmonize with closely similar structures of diverse origin" (convergent evolution). There is more evidence for Mivart's doubts now than ever.

According to current Darwinian evolutionary theory, each gain in information is the result of a great many tiny, modest gains in fitness over millions or billions of years, due to natural selection acting on random mutations. The resulting solutions should then follow inheritance laws, in the sense that the more similar life forms are according to biological classifications, the more similar their genome map should be.

That just did not work out. Different species can have surprisingly similar genes. For example, kangaroos are marsupial mammals, not placentals. Yet their genes are close to humans. Researchers: "We thought they'd be completely scrambled, but they're not."

Kangaroos? Shark and human proteins, meanwhile, are also "stunningly similar." Indeed, sharks are genetically closer to humans than they are to aquarium zebrafish. Researchers: "We were very surprised... "

Sharks? But does all this not raise a serious question? The popular science literature claims that a near identity between the human and chimpanzee genome is irrefutable evidence of common descent. Why then do we hear so little about any of these findings, which muddy the waters? Why are science writers not even curious?

There is also the question of how easily a life form can "evolve" a complex solution to a difficult problem. Birds are said to have evolved ultraviolet vision at least eight times.

Similarly, whether large bird and mammal brains arise from common descent or convergent evolution is actually uncertain. Two distantly related groups of reptiles are thought to have given rise to mammals and birds, both featuring a much higher brain to body weight ratio than in their ancestors. Paleontologist R. Glenn Northcutt writes that the matter is "contentious and unresolved," because brains rarely fossilize.

It's not just mammals and birds. Two different species of deadly sea snake, with "separate evolutions," were found to be identical. Dolphins and insects, we are told, share components of a hearing system.

The smartest invertebrates, the molluscs (including squid, octopuses, and cuttlefish), seem to have evolved brains four times. From one study we learn, "The new findings expand a growing body of evidence that in very different groups of animals -- and mammals, for instance -- central nervous systems evolved not once, but several times, in parallel."

Cambridge paleontologist Simon Conway Morris's Map of Life website provides many other examples of convergence, listing, for example, the convergent evolution of foul smelling plants ("Love me, I stink"), convergence in sex (love-darts), eyes (camera-style eyes in jellyfish), agriculture (in ants) or gliding (in lizards and mammals).

Convergent evolution is evidence that evolution can happen. But the Darwinian model does not seem to be the right one. The life forms appear to be converging on a common goal.

That said, the problem presented for Darwinism by convergent evolution has hardly penetrated the world of pop science writers, high school teachers, politicians, judges, theologians, and entertainers. Mere evidence could not compete with a position so compelling as Darwin's.

Alternatively, however, there is the position taken by many great physicists: The universe is about information and consciousness, not matter. A sense of the results having been directed would not, then, be surprising. For more on that, consult William Dembski's Being as Communion.

Concern about inequality,a big deal about nothing?:Pros and Cons.

How a bill becomes a fruitless talk session.

Darwin of the gaps logic continues to collapse. II

Behold, a Further Use for Body Hair

David Klinghoffer 

purported incompetence or nonexistence of design reflected in bodies, but the hair on your arm or face or elsewhere turns out to have yet another use that was previously unknown. Hair follicles, along with the folds and oil-producing glands in the skin, form a habitat for microorganisms that are vital to the skin's ability to fight off harmful pathogens.

Nature News summarizes:

The folds, follicles and tiny oil-producing glands on the skin's surface create a multitude of diverse habitats, each with its own community of microbes.1 Most of these "commensals" live harmlessly on the skin, and their presence is thought to stop pathogenic microbes from invading the skin's habitats. But these benign residents are not just innocent bystanders -- according to a paper published today in Science, skin-specific bacteria also influence the response from the host's immune system to help fight off infection.2

Immunologist Yasmine Belkaid and her team at the National Institute of Allergy and Infectious Diseases in Bethesda, Maryland, decided to investigate the immunological role of the skin's resident microorganisms, known collectively as the skin microbiome. "For the first time, we've shown that the skin needs microbial signals for proper immune-cell function," says study author Shruti Naik, a graduate student at the University of Pennsylvania, Philadelphia, who is based in Belkaid's lab.

Mice raised in a sterile germ-free environment, thus without their normal complement of skin microbiota, were unable to mount an effective immunological response to attack by a particular pathogen -- but the ability was restored after scientists introduced a normally friendly bacterium, Staphylococcus epidermidis.

We have a dear friend who's quite germophobic and whose kids play with our kids. She's always insisting that nobody may come into her house without a severe scrubbing of the hands, face, etc. I need to remember to bring this to her attention.

In the Netherlands the abyss stares back.

The Culture of Death Is Like the Universe

 Wesley J. Smith 

Once set in motion, it never stops expanding.

Euthanasia boosters, as we know, are so full of baloney. To get the death agenda adopted, they promise the moon, that medicalized killing will be strictly limited, and always restricted to competent adults. Then, once society widely accepts killing as an answer to suffering, the age limits drops -- because how in the name of compassion can a (now) "right" to die be limited to competent adults? 

Belgium has already legalized assisted suicide for children deemed, by their death doctor, mature enough to decide. Now the Dutch Pediatric Association wants to go there too, where the current age limit -- once 16 -- is now 12. But that's not low enough! From the deVolkskrant story (Google translation):

The Dutch Association of Pediatrics (NVK) comes to the position after intense debate. If a child is incompetent, parents should be able to consult with the doctor to decide on euthanasia...

The 12-year-age limit for euthanasia is a problem for pediatricians: they see in practice that even younger children are often well able to see the consequences of their decisions.

Still, doctors are not allowed to do anything when a child between 1 and 12 years asks for euthanasia. The NVK therefore proposes to include "real mental competence" as a benchmark, rather than chronological age.

For children who can not make the decision, the physician in consultation with the parents can decide. This happens already in children between 0 and 1, but doctors believe it should also be possible for incapacitated children under 12 years.

Two points. Infanticide is legally (still) murder in Netherlands and yet, as the story admits, killing sick and disabled babies is an accepted part of Netherlander euthanasia practice.

You see, when it comes to euthanasia, "protective guidelines" and legal boundaries soon don't matter. Netherlander pediatricians and neonatologists kill babies in their cribs without consequence, proving that protective guidelines aren't worth the time it takes to read them. (See the Groningen Protocol, a published bureaucratic check list for deciding which babies can be killed.)

Second, note that the "suffering" would not have to be a terminal illness, which is not a required criterion for euthanasia in Netherlands. This means a depressed child with disabilities, who feels isolated and marginalized, could ask for euthanasia and be killed! Perhaps even a mentally ill child deemed, by a death doctor, sufficiently "competent" to decide that life is not worth living.

How Darwinism undercuts reason.

Lawyer, Scientist, or Animal? Choosing Between Evolution and Human Reason

Sarah Chaffee 

psychologist Tania Lombrozo asks, "Is the Mind's Approach More Like a Scientist or a Trial Lawyer?" She praises advances toward greater scientific objectivity, suggesting this holds promise that humans can overcome their natural biases. But the case for scientific objectivity only makes sense in a context where we can trust our reason. And guess what? That's an assumption more compatible with intelligent design than with an evolutionary framework. 

Lombrozo asks whether we tend to reason like scientists -- that is, examine the evidence and draw conclusions based on it -- or more like trial lawyers -- cherry-picking data to fit our case. She notes:

People are capable of impressive scientific thought (indeed, the best scientists are all people!). And at the same time, people are quite capable of fooling themselves into thinking the evidence does support their beliefs, even when a more objective assessment would suggest otherwise.

But she offers hope: Science is becoming more objective. Therefore we as human beings could be improving too. 

But optimists can point to a critical respect in which we might just be like scientists. Science is continually reinventing itself: We develop new statistical tools, better practices and better theories.

As one example, some scientists have recently adopted a practice called "blind analysis," which guards precisely against the kinds of confirmation biases that could otherwise influence scientific research. With blind analysis, scientists make all decisions about how data will be analyzed prior to seeing the data itself. As a consequence, these decisions can't be guided by their expectations or preferences about the conclusions the data will ultimately support.

If we're like scientists in this sense -- in the sense that we can recognize problems with our thinking and develop better practices, at least some of the time -- then there's room for a more optimistic view of the human mind. Instead of fooling ourselves into believing what we expect or want to believe, we can develop better ways to get ourselves to make the best decisions -- be it through education, artful nudges or better technology.

Blind analysis is a good idea. 

But notice this. Lombrozo places her confidence in science -- a human endeavor -- to reveal truth about the universe. Is that confidence justified? Well, it depends. Judging from her earlier blogging, Lombrozo seems to be in favor of materialistic evolution, but that same viewpoint undermines our trust in reason, or ought to do so if you're consistent. In The Magician's Twin, John West describes C.S. Lewis's views: 

The scientific method is premised on the idea that "rational inferences are valid," but the Myth [of materialistic evolution] undercuts human reason by depicting it as "simply the unforeseen and unintended by-product of a mindless process at one stage of its endless and aimless becoming. The content of the Myth thus knocks from under me the only ground on which I could possibly believe the Myth to be true." Darwin's own gnawing doubt rears its head yet again: "If my own mind is a product of the irrational... how shall I trust my mind when it tells me about evolution?" 

Lewis is joined in this argument by Nancy Pearcey in Finding Truth: 5 Principles for Unmasking Atheism, Secularism, and Other God Substitutes, and Alvin Plantinga in Where the Conflict Really Lies: Science, Religion and Naturalism. 

Darwinism, in other words, undermines itself as a scientific idea. It asks that we trust the theorizing done by human minds, yet tells us those minds are a step away from irrational animals. How did trustworthy reason "evolve" ex nihilo? Materialists sidestep that conundrum.

But if study of the universe reveals evidence of intelligent design, we may have reason to trust our minds after all. Yes, sometimes we evaluate facts objectively and revise our actions accordingly -- while other times we look for data that supports our preconceived notions. Scientists included.

Under materialistic evolution, we are neither scientists nor trial lawyers -- but animals. Under ID, at least there is the chance of human beings exercising right reason and, on that basis, making real scientific progress.

Maths in the dock for design.

How Did Mathematics Come to be Woven Into the Fabric of Reality?

Posted by Barry Arrington

We all learned pi in school in the context of circles.  Pi is the ratio of a circle’s circumference to its diameter.  It is an irrational number approximated by 3.14.

It turns out that pi shows up all over the place, not just in circles.  Here is just one instance.  Take a piece of paper and a stick.  Draw several lines along the paper so that the lines are the length of the stick from each other.  Then randomly drop the stick on the paper.  The probability that the stick will land so that it cuts a line is exactly 2/pi, or about 64%.  If one were to perform millions of trials, one could use the results to perform a very precise calculation of the value of pi without ever considering its relation to circles.

This is just one of many places pi pops up in reality, and pi is just one of several mathematical constants that appear to be woven into the fabric of the universe. One mathematician likened it to looking out over a mountain range, where the bases of the mountains are shrouded in fog, and the symbol for pi is etched into the top of each mountain – one intuitively knows that it is all connected at some basic level even if one has no idea why.

What are we to make of what physicist Eugene Wigner called the “unreasonable effectiveness of mathematics” in describing reality?  The word “unreasonable” makes sense only in the context of expectations.  If one expects the mathematical structure of the universe to be elegant and beautiful, the fact that it turns out to be elegant and beautiful is not unreasonable at all.  It is only unreasonable if one approaches it from the perspective of the metaphysical materialist.  In his universe reality consists of nothing but particles in motion randomly bumping into each other.  In that universe there is no reason to expect any underlying mathematical order, no reason to expect mountain tops etched with pi to pop up all over the place, and no reason to suspect that those mountain tops are connected by a unifying order at the base.

Given materialist premises, none of this makes the slightest bit of sense.  It is just a brute fact.  It cannot be denied or explained.  Yet there it is.

MIT cosmologist Max Tegmark has a theory.  He says consider a character in a computer game (let’s call him Mario) that is so complex and sophisticated that he is able to achieve consciousness.  If Mario were to begin exploring his environment, he would find a lot of mathematical connections.  And if continued to explore, Mario would ultimately find that his entire world is mathematical at its roots.  Tegmark believes we live in a universe that is not just described by mathematics; he believes that mathematics defines all of reality, just as the reality of Mario’s computer game world is defined by mathematics.

Here is the interesting part.  Tegmark makes no design inference.  (He is a multiverse fanatic).  This is astounding.  All he needs to do is take his own analogy one step further.  Why is Mario’s computer game world connected mathematically?  Obviously, it is because that mathematical structure was 
imposed on the game by the game designer.

Why is the universe we live in connected by an unreasonably beautiful, elegant and effective mathematical structure?  Come on Max.  You are a smart guy.  I know you can figure it out.

Cicadas vs. Darwin

The Cicada Challenge to Darwinian Evolution

Evolution News & Views They'll create quite a commotion next month, but they're mostly a harmless nuisance or a wonder of nature, depending on your outlook. They're the northeast brood of Magicicada, the so-called 17-year locusts. Smithsonian Magazine tells about them:

Residents in the Northeast U.S. waiting for warm temperatures may get a surprise along with their May flowers: When the soil reaches 64 degrees Fahrenheit, they'll also get a visit from billions and billions of cicadas.

This latest brood is composed of several species including Magicicada septendecim, M. cassini and M. septendecula, and is expected to take over West Virginia, Virginia, Maryland, New York, Ohio, Pennsylvania and a tiny spot on Long Island. 

In an event that only happens once every 17 years for this brood, the creatures will soon dig their way out of the soil, shed their exoskeletons and emerge en masse. The swarm will spend two to six weeks mating and singing their grating, sing-song call before dying and blanketing the ground with their crispy brown corpses. [Emphasis added.]

Here's a natural wonder worth thinking about. There are 14 identified species of periodic cicadas in the United States. A southern brood on a 13-year cycle came up in 2011 (see Live Science). Both 13 and 17 are prime numbers. Evolutionists have long touted their adaptive story about why this is. Smithsonian says:

Researchers have theorized that the insects spend such a lengthy time underground in an effort to outlive parasites that may harm them, Eoin O'Carroll wrote for The Christian Science Monitor in 2013. Other researchers speculate that the 13 and 17-year life cycles, both prime numbers, are an evolutionary adaptation and a mathematical trick that keeps cicadas from emerging during peak population periods for their predators. 

"A cicada that emerges every 17 years and has a predator with a five-year life cycle will only face a peak predator population once every 85 years," writes Patrick di Justo in The New Yorker, "giving them an enormous advantage over less well-adapted cicadas."

Live Science adds that the sheer numbers provide an advantage, too: no predator could possibly devour so many of them. But it's the prime number quirk that attracts evolutionists' attention:

The key factor is that both numbers are prime; they can't be divided evenly by any smaller numbers (except one). It is no mere coincidence that cicadas have evolved indivisible life cycles. As explained by the entomologist Stephen Jay Gould, prime cycles have a major evolutionary advantage over cycles that are multiples of smaller numbers of years, and for a simple reason: They make cicadas more elusive.

"Many potential predators have 2-5 year life cycles. Such cycles are not set by the availability of cicadas (for they peak too often in years of non-emergence), but cicadas might be eagerly harvested when the cycles coincide," Gould wrote in his best-seller "Ever Since Darwin" (Norton 1977). "Consider a predator with a life-cycle of five years: if cicadas emerged every 15 years, each bloom would be hit by the predator. By cycling at a large prime number, cicadas minimize the number of coincidences (every 5×17, or 85 years, in this case)."

In summary: "Thirteen- and 17-year cycles cannot be tracked by any smaller number."

We could leave it at that, and agree that evolutionary theory is wonderful the way it explains things. Yet think again. Don't the two explanations work against each other? If predation is a problem, why the billions at once? With so many, they could come up every year and do just fine. Why wait? And if selection pressure helps the cicadas, can't it help the predators the same way? Where are the 17-year predators? Besides, you wonder what the predators are eating outside the two-to-six week window the cicadas are active. 

Like the peppered moths and the Galápagos finches, the evolutionary story of cicadas offers a certain intuitive satisfaction, until you start asking questions. Worse, it distracts from the really interesting aspects that really need explaining. To wit:

• The remarkable timekeeping ability of the nymphs to silently count 13 or 17 years.
• The trigger that makes all of them emerge simultaneously. The temperature gauge needs to coordinate with the clock, otherwise they would emerge every year.
• The "incomplete metamorphosis" they undergo (i.e., unlike butterflies shown in the film Metamorphosis, cicadas do not have a chrysalis or pupa stage; the nymphs grow directly into adulthood). Even so, the larvae have to transition from one body plan into another that has completely new structures, like wings, eyes, antennae and reproductive organs. 

Other amazing facts about cicadas tend to get drowned out in the rush to explain the evolution of prime numbers. For instance, cicadas have amazing wing surfaces that burst bacteria. Three years ago, Nature News described nanoscopic pillars on the wings that pop bacterial membranes, shredding them to pieces (see videos in the article). It was such a clever method for disinfection, scientists envisioned creating similar materials that "could one day be applied to public surfaces that commonly harbour disease, such as bus railings." 

PhysOrg mentioned other advantages: "In marked contrast to the biochemical mechanisms of antibiotics, which are subject to acquired resistance, physical mechanisms are non-specific, and cannot be reversed or altered, tackling bacterial cells as a whole." This kind of "anti-microbial physics" could be designed to simultaneously nourish human cells, supporting "a variety of biomedical implants, anti-fouling surfaces or biosensors."

Obviously, any creature capable of powered flight deserves our admiration for impeccable design. Add to that all the other systems required for complex animal life: (e.g., reproductive, digestive, respiratory) and traits characteristic of insects (e.g., articulated legs, compound eyes, antennae) and we see a whole package of systems that challenge blind processes of natural selection.

Rogues II

Barbarians at the gate III:Rogues.

Barbarians at the gate II:The opening engagement.

Wistar and DNA Day: A Fifty-Year Fuse Under Neo-Darwinism

Evolution News & Views 

Today, as we noted on Friday, marks two momentous anniversaries -- of the elucidation of the structure of the DNA molecule by Watson and Crick (they published in the journal Nature on April 25, 1953), and that of the opening of the Wistar Institute conference on "Mathematical Challenges to the Neo-Darwinian Interpretation of Evolution" (1966). 

The latter, if only because fifty years is a nice round number and because Wistar is less familiar to the public, may for us be the more significant of the two. Wistar was the beginning of the end for neo-Darwinism, and in a sense the inception of the modern intelligent design movement. 

How should you celebrate? First of all, for the background on Wistar, watch Discovery Institute's Paul Nelson, below. Dr. Nelson predicts that the upcoming Royal Society meeting will be a replay or update of Wistar (see "Intelligent Design Aside, from Templeton Foundation to the Royal Society, Darwinism Is Under Siege"):econd, the truth is the mathematical challenge to Darwinism is alive and well today. We describe it, and more about the Wistar conference, in the Discovery Institute documentary The Information Enigma, featuring the work of Stephen Meyer and Douglas Axe. See it here if you haven't already:his math, quite accessible really, also forms the background to Richard Dawkins's recent dispute with Dr. Meyer. See Meyer's post, "Dawkins's Dilemma: Misrepresent the Mechanism...or Face the Math."

Called forth by MIT's Murray Eden, Wistar commenced with the memorable words of Nobel laureate Sir Peter Medawar:

[T]he immediate cause of this conference is a pretty widespread sense of dissatisfaction about what has come to be thought as the accepted evolutionary theory in the English-speaking world, the so-called neo-Darwinian Theory. ... There are objections made by fellow scientists who feel that, in the current theory, something is missing ... These objections to current neo-Darwinian theory are very widely held among biologists generally; and we must on no account, I think, make light of them. The very fact that we are having this conference is evidence that we are not making light of them.

But, finally, of course there would be no Wistar, and no consideration of DNA as life's celebrated information carrier, were it not for the vital first step -- Watson and Crick's description of the molecule's double helix structure. How long ago that seems. Just how far we've come since 1953, and the light that distance sheds on evidence for design in the genome, is the subject of a new website, "DNA and Beyond," from our friend, the tireless scholar Thomas E. Woodward. team of science educators and medical professors, is staging "DNA and Beyond" as a month-long celebration. It begins today, DNA Day, with the unveiling of a new DNA model that illustrates the latest discoveries in the genetic control system -- "epigenetics."

The "DNA and Beyond" teaching group highlights recent research on the mysterious epigenetic system of chemical markers, comprising millions of chemical flags and tags that have been discovered "above" or "on top of" (Greek, -epi) the genetic code. The area is not only one of the hottest fields in biology; it is dynamically related to health factors such as diet, exercise, and stress management.

DNA Day is, in addition, the kickoff for the release of a series of short videos, some of which feature CGI action clips of the "dance" of DNA, all available for free streaming at dnaandbeyond.org. Celebrate by learning more there -- and by reading Dr. Woodward's fine books, which include The Mysterious Epigenome and Doubts About Darwin: A History of Intelligent Design.

Another failed Darwinian prediction XX

Cell death

According to evolutionary theory, biological variation that supports or enhances reproduction will increase in future generations—a process known as natural selection. The corollary to this is that biological variation that degrades reproduction will not be selected for. Clearly, natural selection could not result in destructive behavior. Here are two representative statements from Origins:

we may feel sure that any [biological] variation in the least degree injurious would be rigidly destroyed. (Darwin, 63)

Natural selection will never produce in a being any structure more injurious than beneficial to that being, for natural selection acts solely by and for the good of each. (Darwin, 162-3)

But are not examples of such “injurious” behavior obvious? When the rattlesnake rattles its tail, is this not injurious to its hunt for food, and ultimately to its reproductive chances? Darwin argued that this and other such examples are signals to frighten away enemies, not warn the intended prey.

But today we have many examples of injurious behavior that falsify Darwin’s prediction that natural selection “will never produce in a being any structure more injurious than beneficial to that being.” In bacteria, for example, phenomenally complicated mechanisms carefully and precisely destroy the individual. Clearly, this suicide mechanism is more injurious than beneficial to the bacteria’s future prospects.

One such mechanism consists of a toxic gene coupled with an antitoxic gene. The toxic gene codes for a protein that sets the act of suicide into motion and so ultimately kills the bacteria. The antitoxic gene inhibits the toxic gene from executing its mission. Except, that is, when certain problems arise. Lack of proper nutrients, radiation damage and problems due to antibiotics can all cause the antitoxin to be diluted, thus allowing the toxin to perform its mission. (Chaloupka, Vinter; Engelberg-Kulka, Hazan, Amitai; Engelberg-Kulka, Amitai, Kolodkin-Gal, Hazan; University Of Nebraska)

This bacterial suicide is probably good for the bacteria population on the whole. If nutrients are running low, then better for some bacteria to die off so the neighbors can live on. Not only will the reduced population require less nutrients, but the dismantled bacteria help to replenish the food supply. Therefore evolutionists can explain the suicide mechanism as having evolved not for the individual bacteria, but for the population. But the explanation introduces major problems for the theory.

Suicide is probably good for the bacteria population, on the whole, in challenging conditions. Since gene sharing within a bacteria population is at its maximum, evolutionists have no problem explaining such altruism as a result of kin selection (see Altruism). Such a facile response, however, misses the profound problem of how such a design could arise in the first place, for the mechanism is immensely complex.

In this example of bacteria suicide, the antitoxic gene normally inhibits the toxic gene from executing its mission. When the antitoxic gene is diluted then the toxic gene can perform its mission. The toxin does not, however, single-handedly destroy the cell. The toxin is an enzyme that cuts up the copies of DNA (i.e., messenger RNA, or mRNA) that are used to make other proteins. By slicing up the mRNAs, the cell no longer produces the proteins essential for normal operation. But the toxin does not cut up all mRNAs. Some mRNAs escape unscathed, and consequently a small number of proteins are produced by the cell. These include death proteins that efficiently carry out the task of disassembling the cell.

Death proteins are not the only proteins that the toxin allows to be produced. As researchers reported, the toxin “activates a complex network of proteins.” (Amitai) While some of the proteins bring death to the bacteria, others can help the cell to survive. The result is that most cells in the population are destroyed, but a fraction is spared. This of course makes sense. The suicide mechanism would not help the bacteria population if every individual was destroyed. Instead, some survive, and they can be the founders of a new population when conditions improve.

This suicide mechanism and “behavior” is altruistic. Some bacteria die off to save others. And the explanation that this bacteria suicide is due to kin selection adds tremendous complexity to the theory of evolution. Kin selection can select from only that which is available. This elaborate suicide mechanism must have just happened to arise from some combination of random mutations, and then remained in place until the time when it would succeed in surviving a stressful environment. The toxin and antitoxin genes with their clever functionality, the death and survival proteins, the inter cellular communications—all these were needed to be in place and to be coordinated before the kin selection could even begin to act. This is highly unlikely and adds considerable complexity to the theory.

References

Amitai, Shahar, Ilana Kolodkin-Gal, Mirit Hananya-Meltabashi, Ayelet Sacher, Hanna Engelberg-Kulka. 2009. “Escherichia coli MazF leads to the simultaneous selective synthesis of both ‘death proteins’ and ‘survival proteins’.” PLoS Genetics 5:e1000390.

Chaloupka, J., V. Vinter. 1996. “Programmed cell death in bacteria.” Folia Microbiologica, 41:6.

Engelberg-Kulka, Hanna, Ronen Hazan, Shahar Amitai. 2005. “mazEF: a chromosomal toxin-antitoxin module that triggers programmed cell death in bacteria.” J Cell Science 118:4327-4332.

Engelberg-Kulka, Hanna, Shahar Amitai, Ilana Kolodkin-Gal, Ronen Hazan. 2006. “Bacterial programmed cell death and multicellular behavior in bacteria,” PLoS Genetics 2:e135.

University Of Nebraska. 2007. “New Hope For Fighting Antibiotic Resistance,” ScienceDaily April 27.

Darwinism vs.the real world XXVII

Temperature Control: Too Hot, Too Cold, or Just Right?
Howard Glicksman

Editor's note: Physicians have a special place among the thinkers who have elaborated the argument for intelligent design. Perhaps that's because, more than evolutionary biologists, they are familiar with the challenges of maintaining a functioning complex system, the human body. With that in mind, Evolution News is delighted to offer this series, "The Designed Body." For the complete series, see here. Dr. Glicksman practices palliative medicine for a hospice organization.

Since the body is made from matter, it must follow the laws of nature that affect the atoms and molecules making up its trillions of cells. These laws tell us that heat is the transfer of energy from one object to another and temperature is a measure of the random motion within an object or its internal energy. The body's core temperature is directly related to how much heat it produces from its metabolism, whether at complete rest or with activity, and how much heat it loses to or gains from its environment. The body must control its core temperature because, if it isn't just right, it can adversely affect enzyme function, the integrity of the plasma membrane, and other cellular structures.

The body's normal core temperature is set by the hypothalamus at 97o-99oF (36o-37oC). It receives data from the central thermoreceptors and keeps the core temperature at this set-point

using both voluntary and involuntary means. When your core temperature rises or falls outside the normal range, and you feel too hot or too cold, there are things you can do, like take off or put on warm clothes, to help bring the core temperature back towards normal. At the same time, the hypothalamus, using the sympathetic nerves, automatically sends out messages to the blood vessels and sweat glands in the skin to either promote or limit heat loss. Using both of these mechanisms, the body is usually able to keep its core temperature where it should be while staying active. Let's look at what happens when the numbers dictating core temperature just aren't right.

The commonest cause of an elevated core temperature is fever, also called pyrexia. Thistakes place when, under the influence of pyrogens, the hypothalamus increases the set-point. The body responds by reducing heat loss through the skin and increasing production through shivering to preserve this abnormally high temperature. That's why you feel chilly and shake prior to developing a fever. Pyrogens are chemicals released by invading bacteria, immune cells involved in inflammation and fighting infection, and even some types of cancer cells.

Hyperthermia, another common cause of high core temperatures, is when the core temperature is above 99oF (37.2oC) despite having normal thermoregulatory mechanisms in place. This usually takes place when a person is working or playing hard, generating excessive amounts of heat within a hot and humid setting, and the mechanisms for thermoregulation become overwhelmed.

Whether due to a very high fever (hyperpyrexia) from illness or heat stroke from physical and environmental factors, a core temperature above 107oF (42oC), means that several life-threatening reactions are likely to take place. These include things like protein and enzyme breakdown, impairment of mitochondrial function, and loss of plasma membrane stabilization. All of this culminates in severe brain dysfunction, muscle breakdown, loss of thermoregulation, and multi-organ system failure, resulting in death.

Hypothermia exists when the body's core temperature drops below 95oF (35oC) despite having normal thermoregulatory mechanisms in place. This usually happens when people are in a very cold environment without adequate protection. Hypothermia affects every tissue in the body by reducing cell metabolism and diminishing enzymatic activity, including the enzymes needed for energy production and usage. As the core temperature drops below 91oF (33oC), mental confusion is soon followed by loss of consciousness and thermoregulation itself.

Based on our knowledge of how the body works, the ability for our earliest ancestors to survive and reproduce depended on their ability to maintain the right core temperature no matter where they were or what they were doing. For if the system of control they used allowed the core temperature to drop below 91oF (33oC) or go above 107oF (42oC), they would have died. Real numbers have real consequences when it comes to dealing with the laws of nature. Not just any core temperature works for survival. It has to be the right one to preserve protein integrity and cell function in order to keep the brain and all the other organs and tissues in the body working properly.

Just because a system is irreducibly complex does not automatically mean that it will be able to function well enough to allow for life. Besides being irreducibly complex, systems that allow for life must also have natural survival capacity. By this I mean that each system must take into account the laws of nature. This involves having an inherent knowledge of what is needed to keep the organism alive and the ability to do what needs to be done.

The system that uses thyroid function and uses the sympathetic nervous system to adjust the blood vessels and sweat glands in the skin to keep the body's core temperature between 97o-99oF (36o-37o C) seems to naturally know how to get the job done. The same can be said for each of the control systems discussed in this series that manage things like oxygen, carbon dioxide, hydrogen ion, hemoglobin, iron, water, sodium, potassium, glucose, respiratory and heart rate, and blood pressure. Not only do each of these systems demonstrate irreducible complexity with natural survival capacity, but the absence or serious dysfunction of any one of them results in death.

Given what you have learned so far about what it actually takes to keep you alive, are you, like Richard Dawkins, intellectually satisfied about the explanatory power of evolutionary biology?

The more you understand what it takes for life to survive within the laws of nature, the more you will come to realize how inadequate and overly simplistic the theories of evolutionary biologists. How cold-blooded animals evolved into warm-blooded ones is a case in point. That's what we'll consider next time.

Back by popular demand:Darwin's finches

Darwin's Finches: The Hype Continues
Jonathan Wells

Every few years we are treated to glowing news stories about "Darwin's finches." The latest, published today in The Washington Post, is titled "200 years after Darwin, this is how the iconic Galápagos finches are still evolving," and, as usual, it is full of hype.

When Charles Darwin visited the Galápagos Islands in 1835, he collected specimens of the local wildlife. These included some finches that he threw into bags, many of them mislabeled. Although the Galápagos finches had little impact on Darwin's thinking (he doesn't even mention them in The Origin of Species), biologists who studied them a century later called them "Darwin's finches" and invented the myth that Darwin had correlated differences in the finches' beaks with different food sources (he hadn't). According to the myth, Darwin was inspired by the finches to formulate his theory of evolution, though according to historian of science Frank Sulloway "nothing could be further from the truth."

In the 1970s, biologists studied a population of medium ground finches on one of the islands in great detail. When a severe drought left only large, hard-to-crack seeds, 85 percent of the birds perished. The survivors had beaks that were about 5 percent larger than the average beak size in the original population. The biologists estimated that if similar droughts occurred once every ten years, the population could become a new species in only 200 years. In a 1999 booklet defending evolution, the U.S. National Academy of Sciences called the finches "a particularly compelling example" of the origin of species.

But after the drought, birds with smaller beaks flourished again, and the average beak size of the population returned to normal. No net evolution had occurred. No matter; Darwin's finches became an icon of evolution that is still featured in most biology textbooks.

In the 1980s, a population of large ground finches, with larger beaks than the medium ground finches, migrated to the island. When a drought in 2004-2005 again reduced the food supply, the medium and large ground finch populations both declined. But since even the largest beaks among the medium ground finches were no match for the beaks of the large ground finches, the latter pretty much monopolized the larger seeds and the former had to make do with smaller seeds. This time, the medium ground finches that survived the drought had beaks that were smaller than the average size in the original population. Biologists studying the finches argued that birds with smaller beaks were better able to eat the tiny seeds that were left after the large ground finches ate the big ones, and they concluded that this was again an example of "evolutionary change."

Then those biologists, together with some colleagues, studied DNA sequences in the medium ground finches. They correlated several regions of DNA with the 2004-2005 decrease in average beak size, and they concluded that one region in particular, called HMGA2, is associated with beak size. (Note, however, that HMGA2 did not cause the decrease.)

Enter The Washington Post. According to today's article, the biologists "pinpointed the bit of finch DNA behind the swift transition" in average beak size and "now have a pretty thorough blueprint of how these famous finches evolve."

Wait a minute. Average beak size increased slightly during one drought, only to return to normal after the rains return. Then average beak size decreased slightly during another drought. A region of DNA is correlated with beak size. And somehow that tells us how finches evolved in the first place?


As Winston Churchill might say, "Never in the field of science was so much based by so many on so little."

Immigration now too much of a good thing :Pros and Cons

Barbarians at the gate?

Intelligent Design Aside, from Templeton Foundation to the Royal Society, Darwinism Is Under Siege

David Klinghoffer 

y paradigm isn't in serious turmoil. Science Magazine announces an $8.7 million project by the Templeton Foundation seeking an "evolution rethink." I'm trying to think of the last time I heard Science reporting on support for a "gravity rethink," or a "heliocentrism rethink." The gist of it: 

For many evolutionary biologists, nothing gets their dander up faster than proposing that evolution is anything other than the process of natural se- lection, acting on random mutations. Suggestions that something is missing from that picture -- for example, that evolution is somehow directed or that genetic changes can't fully explain it -- play into the hands of creationists, who leap on them as evidence against evolution itself.

Oh, those dreaded "creationists" and evolution deniers. They mean us. 

No wonder some evolutionary biologists are uneasy with an $8.7 million grant to U.K., Swedish, and U.S. researchers for experimental and theoretical work intended to put a revisionist view of evolution, the so-called extended evolutionary synthesis, on a sounder footing. Using a variety of plants, animals, and microbes, the researchers will study the possibility that organisms can influence their own evolution and that inheritance can take place through routes other than the genetic material.

Whatever the outcome, the news has yanked Jerry Coyne's chain. He complains in the article:

Evolutionary biologists shouldn't accept its money, says Jerry Coyne, an evolutionary biologist at the University of Chicago in Illinois, who has been a persistent critic of the foundation for linking science and religion. "It really slants the way science is done," he told Science. 

And again:

Some prominent evolutionary biologists have pushed back against this seeming rebellion. "It's a mixture of old ideas that aren't novel and reasonable ideas that haven't been shown to be of any importance," Coyne says. He and others insist that evolutionary bio- logy has already incorporated some of these ideas or is in the process of doing so -- meaning no "extension" is necessary.

The scope is impressive -- "49 researchers from different fields and ... 22 interconnected projects across eight institutions." Coyne's dyspeptic reaction gives you an idea of what a huge deal this is.

Oh, so you want to dismiss Templeton because its perspective isn't rigidly materialist enough? Fine, meanwhile this coming November, the Royal Society plans a conference on "New trends in evolutionary biology: biological, philosophical and social science perspectives." Despite the subdued title -- reflecting British understatement, perhaps -- this is more big news, a gathering of major mainstream voices from the world of biology and other fields to hash out the merits of the call for a Third Way for evolution -- not classic Darwinism, not intelligent design, but something...else:

Scientific discussion meeting organised in partnership with the British Academy by Professor Denis Noble CBE FMedSci FRS, Professor Nancy Cartwright, Sir Patrick Bateson FRS, Professor John Dupré and Professor Kevin Laland.

Developments in evolutionary biology and adjacent fields have produced calls for revision of the standard theory of evolution, although the issues involved remain hotly contested. This meeting will present these developments and arguments in a form that will encourage cross-disciplinary discussion and, in particular, involve the humanities and social sciences in order to provide further analytical perspectives and explore the social and philosophical implications.

When it comes to "hotly contesting" the "standard theory of evolution," the timing couldn't be better. This coming Monday we'll have the opportunity to celebrate two significant anniversaries -- that of the description of the structure of the DNA molecule by Watson and Crick (they publishedon April 25, 1953) and the fiftieth anniversary of the Wistar Institute conference on "Mathematical Challenges to the Neo-Darwinian Interpretation of Evolution." 

Note the conference's title. It wasn't about "rejecting" or "denying" evolution but searching for a justified interpretation of the agreed scientific evidence. The Philadelphia meeting, spurred on by MIT's Murray Eden and planting a seed for what would become the modern ID movement, which offers its own positive interpretation, convened on April 25-26, 1966.

If you'll forgive a morbid metaphor, Wistar was like the ominous spot first seen on the X-ray of a vital organ -- the beginning of the end for unguided Darwinian processes as the sole, satisfactory explanation of how complex biological features evolve.

ID, obviously, is one source of the current challenge to Darwinism, but it's only one source. You could erase ID advocates entirely from the battle map, and Darwinian theory would still be under siege. Evolution's smug cultists are in denial about that, but it's true.

A clash of Titans XV