Fossil egg discoveries, including one in Antarctica, show dinosaurs and marine reptiles laid soft-shell eggs

By Ashley Strickland, CNN

Updated 1548 GMT (2348 HKT) June 17, 2020

This artist's illustration shows a young Purussaurus attacking a ground sloth in Amazonia 13 million years ago.
Photos: Ancient finds
This artist's illustration shows a young Purussaurus attacking a ground sloth in Amazonia 13 million years ago.
Hide Caption
1 of 158
This bundle of bones is the torso of another marine reptile inside the stomach of a fossilized ichthyosaur from 240 million years ago.
Photos: Ancient finds
This bundle of bones is the torso of another marine reptile inside the stomach of a fossilized ichthyosaur from 240 million years ago.
Hide Caption
2 of 158
Researchers uncovered the fossilized fragments of 200,000-year-old grass bedding in South Africa's Border Cave.
Photos: Ancient finds
Researchers uncovered the fossilized fragments of 200,000-year-old grass bedding in South Africa's Border Cave.
Hide Caption
3 of 158
Meet Sasha, the preserved and reconstructed remains of a baby woolly rhinoceros named that was discovered in Siberia.
Photos: Ancient finds
Meet Sasha, the preserved and reconstructed remains of a baby woolly rhinoceros named that was discovered in Siberia.
Hide Caption
4 of 158
Stone tools made from limestone have helped researchers to suggest that humans arrived in North America as early as 30,000 years ago.
Photos: Ancient finds
Stone tools made from limestone have helped researchers to suggest that humans arrived in North America as early as 30,000 years ago.
Hide Caption
5 of 158
This image shows both sides of the 1.4 million-year-old bone handaxe made from the femur of a hippopotamus. It was most likely crafted by ancient human ancestors like Homo erectus.