A hatchling Protoceratops andrewsi fossil from the Gobi Desert in Mongolia. Credit M. Ellison/American Museum of Natural History
New York Times: Some Dinosaur Eggs Took Six Months or More to Hatch
For decades now, the drumbeat of dinosaur news has been their similarity to birds. They were warmblooded! They had feathers! And they’re still around, because birds are actually dinosaurs.
All true, but those that were nonavian dinosaurs, as they are now called, were not all beak and tweet. They were closely related to other living reptiles like crocodiles, and new findings about how long their eggs took to hatch bring that point home.
Scientists reported on Monday that by using a new technique on exceedingly rare fossils of unhatched dinosaur embryos, they determined that those embryos took twice as long to hatch as bird eggs of a similar size. The embryo of a large duck-billed dinosaur took at least six months to hatch, and the eggs of larger dinosaurs may have taken even longer.
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More News On How Long Did It Take Dinosaur Eggs To Hatch
No wonder the dinosaurs died out: They were vulnerable for the SIX MONTHS it took them to get out of their eggs when they were born -- Daily Mail
We Finally Know How Long It Took for Dinosaur Eggs to Hatch -- Seeker
Did Dinosaur Eggs Lead To Their Doom? -- Discover Magazine
Dinosaur 'Baby Teeth' Reveal That Dino Eggs Hatched Slowly -- NPR
Dinosaur eggs: Slow hatching eggs made dinosaurs go extinct when asteroid struck -- International Business Times