Amniotic egg appears very early in reptilian evolution. Egg has several special extra-embryonic membranes, which allow it to develop on land independent of water. Just as significant as evolution of ...

Amniotic egg appears very early in reptilian evolution. Egg has several special extra-embryonic membranes, which allow it to develop on land independent of water. Just as significant as evolution of ...

This new structure allowed embryos to take in stored ... According to research, the amniotic eggs made their debut roughly 340 million years ago and the first chickens evolved around 58,000 ...

Scientists at the University of Geneva have researched Chromosphaera perkinsii and believe they may have the answer.