A large 7.4 earthquake rattled the waters in one of the world's roughest ocean passages, triggering fears of a tsunami.

The best time to watch a meteor shower is in the early predawn hours when the moon is low in the sky. Competing sources of ...

For decades, the Kármán Line, set at an altitude of 100 kilometers (or 62 miles) above sea level, has been the widely ...

The soon-to-reenter Soviet Cosmos 482 Venus probe is getting increased attention by satellite trackers – and new imagery ...