‘It’s Super Spectacular.’ See How the Tonga Volcano Unleashed a Once-in-a-Century Shockwave.

Antikythera Mechanism photos: See the world's first computer

World's first computer, the Antikythera Mechanism, 'started up' in 178 B.C., scientists claim

NASA's Hubble Space Telescope spots largest comet ever seen by astronomers. It has an estimated diameter of 80 miles, which is larger than the state of Rhode Island.