Did Neanderthals Teach Modern Humans How to Make Tools?
By Charles Q. Choi, Live Science Contributor
Neanderthals
apparently created the oldest known examples of a kind of bone tool
used in Europe, thus raising the possibility that modern humans may have
learned how to make these tools from Neanderthals, researchers say.
Neanderthals
were once the closest living relatives of modern humans, dwelling
across a vast area ranging from Europe to the Middle East to western
Asia. This ancient lineage of humans went extinct about 40,000 years
ago, about the same time modern humans expanded across the world.
Neanderthals
created artifacts similar to ones made at about the same time by modern
humans arriving in Europe, such as body ornaments and small blades.
Scientists hotly debated whether such behavior developed before or after
contact with modern humans. "There is a huge debate about how different
Neanderthals were from modern humans," said Shannon McPherron, an
archaeologist at the Max Planck Institute for Evolutionary Anthropology
in Leipzig, Germany.
Now,
McPherron and his colleagues have discovered that Neanderthals created a
specialized kind of bone tool previously only seen in modern humans.
These tools are about 51,000 years old, making them the oldest known
examples of such tools in Europe and predating the known arrival of
modern humans.
New Neanderthal behavior
The
bone tools in question are known as lissoirs ("polishing stones"),
which are used to smooth out hides to make them tougher, impermeable and
lustrous. Scientists unearthed fragments of four examples of such tools
at two Neanderthal sites in southwestern France. The uniform smoothness
and rounded edges of the lissoir tips probably resulted from scraping,
thus hinting that they were, indeed, used against soft materials such as
hides.
"We have found an entirely new aspect of Neanderthal behavior," McPherron said.
Until
now, all known Neanderthal bone tools researchers found "have looked
just like their stone tools," McPherron said. "In other words,
Neanderthals looked at bone as just another raw material to flake into
stone tool types like scrapers, notches and hand axes."
"Modern
humans, on the other hand, made lots of different kinds of bone tools
that took advantage of the properties of bone, to be ground into
specific shapes like points, awls and smoothers," McPherron added.
"Here, for the first time, we have evidence of Neanderthals doing
exactly the same thing. They were taking ribs and shaping them into a
tool that looks identical to the modern human tools found 40,000 years
ago and to tools still in use today for preparing hides."
"What
this means is that Neanderthals did, in fact, recognize that bone could
be worked in special ways to create new kinds of tools, and in this
way, Neanderthals are not different from later modern humans," McPherron
added. "For many researchers, specialized bone tools were thought to be
one of the technologies that separate the two groups of humans. This is
no longer the case." [Top 10 Things That Make Humans Special]
McPherron cautioned that the researchers are not suggesting that Neanderthals were the first to make bone tools.
"There
are sophisticated bone tools that are even older in Africa, for
instance," McPherron said. "Neanderthals were, however, the first in
Europe to make specialized bone tools."
And
these aren't the first Neanderthal bone tools, but instead the first
Neanderthal bone tools that weren't just replicas of their stone tools.
Neanderthal invention?
It
remains unclear whether Neanderthals learned how to make lissoirs from
modern humans or invented them entirely on their own, or even whether
modern humans learned how to make this particular kind of bone tool from
Neanderthals.
"The
date we have of approximately 51,000 years old is earlier than the best
evidence we have of modern humans in Europe, but it is still close
enough that we have to mention the possibility," McPherron said. "What
we need to do now is look in even older sites for these same tools, to
see if Neanderthals had been making these tools for much longer."
"I
think that as others look for this bone-tool type amongst their small
bones, we will find many more," McPherron added. "I suspect that this
new aspect of Neanderthal behavior was actually rather widespread."
For
now, these findings "are the best evidence we have that Neanderthals
were capable of inventing on their own one aspect of what has been
called modern human culture," McPherron said.
The scientists detailed their findings online Aug. 12 in the journal Proceedings of the National Academy of Sciences.