National Geographic news4 年
What are ammonites, and how did they come to rule the prehistoric seas?
Earth once hosted more than 10,000 species of these ancient marine predators. Find out how they lived, when they vanished, and how much we know about them today. Based on the fossil record ...
来自MSN6 个月
Prehistoric new species — predator of the skies — may be crucial ‘missing link.’ See it
It was flying. Pterosaurs were species of prehistoric reptiles with winged bodies and beak-like mouths capable of snatching small animals and insects off the ground. Some pterosaurs — “the ...