Here's How Planet Hunters Are Going to Find the Next Earth

Twenty years ago, discovering another Earth sounded like a science fictional dream. But within a generation, astronomers now believe we might do just that.

Gizmodo: Ancient Asteroid Impacts Boiled the Oceans and Made Life on Earth Hell

Roughly 3.3 billion years ago, Earth’s early life forms were plunged into an unimaginable hell, when a series of massive asteroids smashed into the young planet, vaporizing the oceans and scorching the skies.