A time-lapse taken from the front of the International Space Station as it orbits our planet at night. This movie begins over the Pacific Ocean and continues over North and South America before entering daylight near Antarctica.
Earth's biodiversity is vanishing at an alarming rate. This video from National Geographic photographer Joel Sartore shows what we stand to lose. More information is available in his forthcoming book, RARE: Portraits of America's Endangered Species.
Some people worried that the cancellation of the Constellation moon programme had ended any hopes of Americans returning to Moon. Now, though, the private sector is arguing that the new spending plan actually makes it more likely America will return to the moon.