Flying with Their Legs: Hind feathers made primitive bird nimble

1:29pm, September 20, 2006

The earliest-known bird may have soared ancient skies on four wings. Feathers covered the legs of Archaeopteryx, a creature that lived 150 million years ago and had wings like modern birds but teeth and claws like dinosaurs. A new report argues that Archaeopteryx used these leg feathers to improve its flight.

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