Check out all the best free things to do in San Francisco - and a few cheap ones too. We've got kid-friendly activities, ...

NASA’s Curiosity Mars rover has detected the largest organic (carbon-containing) molecules ever found on the red planet. The ...

The surface of Mars is known for being an extremely cold, desiccated, and irradiated place. But as its many surface features ...

NASA's Perseverance rover has discovered a strange rock studded with hundreds of small dark spheres. This unexpected find ...

NASA's Perseverance Mars rover spotted a mysterious rock made of hundreds of tiny spheres that resemble spider eggs. Studying ...