One of the most compelling -- and enduring -- mysteries in
archaeology concerns the rise of early humans and the decline of Neanderthals.
For about 250,000 years, Neanderthals lived and evolved, quite successfully, in
the area that is now Europe. Somewhere between 45,000 and 35,000 years ago,
early humans came along.
They proliferated in their new environment, their population
increasing tenfold in the 10,000 years after they arrived; Neanderthals
declined and finally died away.
What happened? What went so wrong for the Neanderthals --
and what went so right for us humans?
The cause, some theories go, may have been environmental,
with Neanderthals' decline a byproduct of -- yikes -- climate change. It may
have been social as humans developed the ability to cooperate and avail
themselves of the evolutionary benefits of social cohesion. It may have been
technological, with humans simply developing more advanced tools and hunting
weapons that allowed them to snare food while their less-skilled counterparts
starved away.
The Cambridge researchers Paul Mellars and Jennifer French
have another theory, though. In a paper in the journal Science, they concluded
that "numerical supremacy alone may have been a critical factor" in
human dominance -- with humans simply crowding out the Neanderthals. Now, with
an analysis in American Scientist, the anthropologist Pat Shipman is building
on their work. After analyzing the Mellars and French paper and comparing it
with the extant literature, Shipman has come to an intriguing conclusion: that
humans' comparative evolutionary fitness owes itself to the domestication of
dogs.
Yep. Man's best friend, Shipman suggests, might also be
humanity's best friend. Dogs might have been the technology that allowed early
humans to flourish.
