Planet Earth

Irish cannibals and Neanderthal sex: Just how big is our species?

The LoomBy Carl ZimmerSep 21, 2012 7:10 PM


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When the first fossils of Neanderthals came to light 155 years ago, they raised a tough question: did they come from a member of our own species, or a separate one? For all the progress scientists have made in studying Neanderthals since then, the answer remains tough--in part because it's not that easy to define a species. NOVA asked me to write about this enduring question. You can read my answer here.

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