暴龙（Tyrannosaurus rex）的进化史可追溯至来自亚洲的祖先。气候变迁与灭绝事件助力暴龙科与巨型掠食龙体型增长并向全球扩散，不同种群演化出适应各自环境的特征。

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.