Space.com

What's Hot This Week Rare Sight: Remains of Ancient Mars Lake Seen in Satellite Photos by Clara Moskowitz, SPACE.com Senior Writer A satellite orbiting Mars has discovered evidence that a giant crater was once a water-filled lake, scientists announced today. At Mars Crater, NASA Rover Finds Evidence of Ancient Water Hotspot by Mike Wall, SPACE.com Senior Writer NASA's Mars rover Opportunity has found another spot where warm water may have flowed or percolated on the Red Planet long ago, researchers announced Thursday. Sponsored by: Spaceport's Construction Heralds Era of Commercial Space Travel Space Junk Problem Is More Threatening Than Ever, Report Warns Top 10 Apollo Hoax Theories 'Apollo 18' Offers Conspiracy Theory, to NASA's Surprise Best Time to See Elusive Planet Mercury in Morning Sky Is Now