There are no two ways about it—space will kill you if you give it half a chance. More than land, sea, or air, the space ...

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.

The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.