One giant peek into mankind: What’s inside an astronaut?A groundbreaking genetic study of twin NASA astronauts Mark and Scott Kelly may teach us as much about the human body as about space
Boeing and SpaceX to ferry astronauts to space stationThe two winners have won contracts to deliver U.S. astronauts to the International Space Station starting in 2017
Red dawnMars used to look like cottage country. This year, we may find out what turned it into a barren wasteland.
Chris Hadfield: Earth-boundIn 2012, Hadfield was denied medical clearance to go to space. He recounts the politics and the chaos that followed.
Chris Hadfield divulges details of dispute that almost kept him from space’The secrecy and paternalism really bothered me’
The wonder of Chris HadfieldHe saw space and Earth as if they were brand-new and shared his experience aboard the ISS with millions