Scientists have struggled for centuries to pinpoint the qualities that
separate human beings from the millions of other animal species that
have evolved on this planet. David Pogue explores the traits we once
thought were uniquely ours—language, tool-making, even laughter—to
uncover their evolutionary roots. He'll trace some of the crucial steps
that transformed cave men to accountants, and find out if any of his own
DNA came from a Neanderthal ancestor.
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