What do we know about dinosaur eggs?
A fossilized embryo of the duck-billed Hypacrosaurus

These fossils can reveal a lot about how dinosaurs lived Darla Zelinitsky A fossilized embryo of the duck-billed Hypacrosaurus. Some dinosaur eggs took a surprisingly long time to hatch, according to a study published Monday in the journal Proceedings of the National Academy of Sciences. By examining the teeth of unhatched dinosaur embryos, paleontologists determined that…