Low oxygen triggers moth molt

A new explanation for one of nature's most mysterious processes, the transformation of caterpillars into moths or butterflies, might best be described as breathless.

Evolution in reverse: insects recover lost 'wings'

The extravagant headgear of small bugs called treehoppers are in fact wing-like appendages that grew back 200 million years after evolution had supposedly cast them aside, according to a study published Thursday in Nature.

Cyborg-walkers stride toward Japan's robotics future

Three Japanese cyborg look-alikes turned heads on busy Tokyo streets and subway trains Monday as they made their way to a robotics conference on a hot summer's day -- without breaking a sweat.

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