Evolution of birds, illustration

Bildnummer 13388013
Evolution of birds, illustration
Evolution of birds, illustration. Modern birds (left) evolved from therapod dinosaurs (right) that lived during the Jurassic period (around 165-150 million years ago). Primitive feathers were not adapted for flight, instead they probably provided insulation. Archaeopteryx (second from left) is widely thought to be one of the first flying dinosaurs.
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Credit: Science Photo Library / Garlick, Mark
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