The inner solar system is a lot calmer than it was 4 billion years ago, during what’s known as the heavy bombardment period. Over the course of that violent stretch, which lasted about 500 million ...

This is the spectacular moment a meteoroid soared through the night sky over Thailand. Footage shows the glowing green orb hurtling through the darkness, initially sparking fears of a Cambodian rocket ...

Tornadoes are officially the scariest natural disaster, according to new research. A survey of 2,500 Americans split evenly by U.S. region found that regardless of where they live, the threat of a ...