Fossils from Mongolia, Argentina show some dinosaurs laid soft-shelled eggs

Scientists have unearthed the first fossils of soft-shelled eggs laid by dinosaurs - two disparate species from Argentina and Mongolia - in a discovery suggesting that the earliest dinosaurs produced such eggs before some lineages turned to hard shells.The embryo-containing eggs - leathery on the outside rather than hard and calcified like those of birds - belonged to a dinosaur from Patagonia called Mussaurus from about 200 million years ago and one called Protoceratops from the Gobi Desert fro