
South African Embryo Fossil May Push Back Direct Evidence of Egg-Laying in Mammal Ancestors
A reported embryo fossil from South Africa is being described as the world’s oldest proof that therapsids, the mammal ancestors that lived between 280 and 200 million years ago, laid eggs.
- A Phys.org candidate describes a South African embryo fossil as the world’s oldest proof that mammal ancestors laid eggs.
- The fossil is tied to therapsids, animals that lived between 280 and 200 million years ago.


