SpaceChris Hadfield: Social media started with Apollo The man who sang Space Oddity aboard the ISS talks about sharing the realities of space flight and how everyone can use an astronaut's mindset to live better Opinion
SpaceBrake away: Rethinking how we land on Mars NASA is rebooting its Mars landings, thanks to a smart idea from the cold war era, and high-stakes rocket tests in the desert. Sally Adee looks on Features