The roughly 2,000-year-old mosaic was buried in Pompeii when Mount Vesuvius erupted in A.D. 79. It was discovered in 1831, ...

NASA's Curiosity rover has made a groundbreaking discovery on Mars by uncovering pure sulfur crystals within a broken rock.

Planning a trip to White Sands National Park? We look at crowds, weather, cost, and activities so you can determine the best ...