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Shell with engraving made by Homo erectus. (Photo: Wim Lustenhouwer, Vrije Universiteit)
Theme music bed copyright Raphaël Gluckstein, Creative Commons License by-nc-nd-2.0
The first evidence that Homo erectus decorated their tools has been discovered.
American mastodons in the North died out much earlier than had been thought.
New York is cleaner, thanks to ants eating large amounts of garbage.
Low frequency hearing allows elephants to detect thunderstorms over very long distances.
An ecologist makes the controversial case that we've overstated the dangers of invasive species.
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