Venture across floating ice with a mother polar bear and her two cubs as they struggle to survive. Discover the extraordinary underwater world of the Arctic sea with beluga whales, Greenland sharks an...

Join the Mars rovers Spirit and Opportunity for an awe-inspiring journey to the surface of the mysterious red planet. Through the eyes of these two intrepid, state-of-the-art rovers, and with NASA sci...

Launched into space November 26, 2011, the "Curiosity" rover's mission is to land on Mars this August to search areas of Mars for past or present conditions favorable for life, and conditions capable ...