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Flight is a rare skill in the animal world. Among vertebrates, it evolved only three times: in bats, birds, and the long-extinct pterosaurs. Pterosaurs were the pioneers, taking to the skies more than ...

From humans and dinosaurs to starfish and seagrass, every animal, plant, and fungus on Earth appears to trace its origins back to a single strange clan of microbes known as the Asgard archaea. In a ...

New York (AP) — A tiny fossil skull nicknamed "Wonderchicken" is giving scientists a rare glimpse at early ancestors of today's birds. It may be the oldest known fossil from this group. With a face ...