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Desert ants have a nifty way of finding their way back home after a foray out of the nest to find food -- they count their steps. To prove it, some sc (more)

Desert ants have a nifty way of finding their way back home after a foray out of the nest to find food -- they count their steps. To prove it, some scientists devised a creative experiment that showed just how the little guys do it. NPR's Robert Krulwich and Odd Todd explain.

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