Perfectly Preserved Dinosaur Embryo Inside Fossilised Egg Discovered in China
It's one of the most stunning dinosaur fossils I've ever seen. But it's also important: it tells us that the 'tucking postures' of today's birds--in which they curl their head under their arms and legs before hatching--first evolved in their dinosaur ancestors. pic.twitter.com/Oc1An63E4J— Steve Brusatte (@SteveBrusatte) December 21, 2021
"It is an amazing specimen. I have been working on dinosaur eggs for 25 years and have yet to see anything like it", Zelenitsky told CNN.
Rare well-preserved dinosaur embryo has a bird-like pre-hatching posture, raising the possibility that this behavior first evolved among non-avian theropods during the Cretaceous. Learn more from this study in @iscience_cp: https://t.co/EPykTzjbyS@FionMaWS pic.twitter.com/DxRRzZX0ZI— Cell Press (@CellPressNews) December 21, 2021