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52.9 MB (6.7 MB compressed)
5000 x 3699 pixels
42.4 x 31.2 cm ⏐ 16.7 x 12.3 in (300dpi)
JOE TUCCIARONE / SCIENCE PHOTO LIBRARY JOE TUCCIARONE / SCIENCE PHOTO LIBRARY
Four-winged dinosaur. Artwork of Microraptor gui, a gliding dinosaur with feathers on all four limbs, which lived in the early Cretaceous period about 130 million years ago. This tiny dinosaur was only about 70 centimetres long. It is classified as a member of the dromaeosaurid family. Its discovery provides evidence that birds evolved from a gliding ancestor, rather than a fast-running ground-dweller. However, it may not be a direct ancestor of modern birds.
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