One of Earth’s earliest mass extinctions wiped out most ocean life during a sudden global ice age. From the ruins, jawed vertebrates survived, diversified, and transformed the course of evolution.

Almost two years since its theatrical release, Fede Álvarez’s franchise-saving Alien film is a streaming hit. Find out more here.

Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of ...