ScienceSleepless in space: NASA finds astronauts need pills to snooze Use of sleeping pills by many astronauts in space could have worrisome consequences, a study finds. Ability to react quickly to emergency could be a problem, researchers say.by Jim Algar
ScienceNASA tests Cannae Drive, impossible engine that might make deep space exploration possibleby Lori Sandoval
CultureFather builds interactive NASA spaceship for his son: Comes with a robot arm and mission controlby Vamien McKalin