They analyzed embryo-bearing egg fossils ascribed to the dinosaurs Protoceratops and Mussaurus, showing these early dinosaurs laid soft, leathery shells. Hard, calcified eggshells evolved much ...

What should be noticed is that in Jirantai three broods of dinosaur fossil eggs were unearthed, from which twenty-seven intact fossil eggs and many shell fragments were found. The shape of these ...

Fossilised remains - including fossil bones and teeth - are known as body fossils. Fossilised shells are also body fossils ... The most common way an animal such as a dinosaur fossilises is called ...

Paleontologists continue to find fossils ... shells form, a second egg forming around the first. Birds, more so than other reptiles, sometimes produce eggs like this, hinting that egg-laying ...

Scientists on Tuesday announced the discovery of an exquisitely preserved dinosaur embryo from at least 66 million years ago that was preparing to hatch from its egg just like a chicken.