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Dinosaur Egg Fossil Contains Exquisitely Preserved Embryo
A group of fossils were uncovered in Ganzhou, Jiangxi province, China, in 2000. They were delivered to a museum where they were stored. Only in 2015 did a researcher notice that a fossil dinosaur egg had a crack that revealed an embryo inside, developed to just days short of hatching. The 66 million-year-old dinosaur was an oviraptorosaur, a type of dinosaur that would evolve into birds. And the embryo, named "Baby Yingliang," shows many birdlike features. These include a beak, egg teeth used to break out of a shell, a hard shell, and embryonic feathers. Baby Yingliang was still a dinosaur, however, as it had front claws instead of wings. A feature not previously seen in embryonic dinosaur fossils is the "head tucking" posture found in embryonic birds.
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