Throughout Earth's history, ice caps have been very rare, but a model of the past 420 million years suggests an explanation ...

How did Earth transform from a hostile, acidic ocean world to one that nurtured life? Scientists at Yale and in Singapore ...

Roughly 250 million years ago, traveling from present-day Australia to North America would have been surprisingly simple-a ...

Have you noticed that when you watch someone move—like watching people dance, or watching your favorite sport—that you almost ...