Earth is often described as a water world, but how that water arrived has never been settled. For years, the focus has rested on asteroids and comets delivering hydrogen long after the planet formed.
With major eclipses, brilliant supermoons, and lineups of five or more planets, 2026 offers something awe-inspiring in every season. Here’s what to watch for. Solar prominences and their associated ...
Man Kept a Rock He Thought Was ‘Gold’ for Years. Turns Out It Was a 4.6-Billion-Year-Old Treasure Even Rarer than Gold ...