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The two types of dinosaur embryos researchers examined were those from Protoceratops - a sheep-sized dinosaur found in the Mongolian Gobi Desert whose eggs were quite small (194 grams) - and Hypacrosaurus, an enormous duck-billed dinosaur found in Alberta, Canada with eggs weighing more than 4 kilograms.Įrickson and his team ran the embryonic jaws through a CT scanner to visualize the forming dentitions. “Embryos can potentially tell us how dinosaurs developed and grew very early on in life and if they are more similar to birds or reptiles in these respects.” “Time within the egg is a crucial part of development, but this earliest growth stage is poorly known because dinosaur embryos are rare,” said co-author Darla Zelenitsky, assistant professor of geoscience at University of Calgary. To do that, they accessed some rare fossils - those of dinosaur embryos. Comparable-sized reptilian eggs typically take twice as long - weeks to many months.īecause the eggs of dinosaurs were so large - some were about 4 kilograms or the size of a volleyball - scientists believed they must have experienced rapid incubation with birds inheriting that characteristic from their dinosaur ancestors.Įrickson, FSU graduate student David Kay and colleagues from University of Calgary and the American Museum of Natural History decided to put these theories to the test.

Scientists had long theorized that dinosaur incubation duration was similar to birds, whose eggs hatch in periods ranging from 11-85 days. “Did their eggs incubate slowly like their reptilian cousins - crocodilians and lizards? Or rapidly like living dinosaurs - the birds?”

“Some of the greatest riddles about dinosaurs pertain to their embryology - virtually nothing is known,” Erickson said. In an article in the Proceedings of the National Academy of Science, FSU Professor of Biological Science Gregory Erickson and a team of researchers break down the complicated biology of these prehistoric creatures and explain how embryonic dental records solved the mystery of how long dinosaurs incubated their eggs. Groundbreaking research led by a Florida State University professor establishes a timeline of anywhere from three to six months depending on the dinosaur. But how long did it take for a baby dinosaur to incubate? An ostrich hatchling emerges from its egg after 42 days.

A human typically gives birth after nine months. HOW LONG DID IT TAKE TO HATCH A DINOSAUR EGG? FSU RESEARCH SAYS 3-6 MONTHS EST *** FOR IMMEDIATE RELEASE CONTACT: Kathleen Haughney, University Communications (850) 644-1489 2, 2017 News Research News Releases Journal News Medical News Science News Life News Business News Expert Pitch Google Fact Check Research Alert Marketplace News With Video/Audio Multimedia RSS Feeds by Latest News Coronavirus News Currently Embargoed