Fossil egg discoveries show dinosaurs and marine reptiles laid soft-shell eggs - CNN

Not all dinosaur eggs had a hard shell like bird eggs do today. Instead, new research has suggested that the first dinosaur eggs were soft-shelled like those of turtles, snakes and lizards. This includes a giant soft-shell egg from 66 million years ago found … https://www.cnn.com/2020/06/17/world/soft-dinosaur-eggs-scn/index.html