The arrival of Endeavour in Los Angeles last week has been described by many as the final note in the coda to NASA's shuttle program. To commemorate its end, we turned to the program's beginnings, where we discovered a stunning assortment of high resolution concept art. (If you've been hunting for a new background…

Earth's continents are constantly changing, moving and rearranging themselves over millions of years - affecting Earth's climate and biology. Every few hundred million years, the continents combine to create massive, world-spanning supercontinents. Here's the past and future of Earth's supercontinets.

Space Shuttle Atlantis took to the skies this week, carrying thousands of microscopic worms to be used in muscle-degeneration research. We already know these worms can handle spaceflight, because in 2003, another group of them survived a fall from orbit.