Plus: Bringing astronauts back from the ISS, fixing hearts with space-grown cells, why your kids need to touch grass and more ...
NASA's two stuck astronauts took their first spacewalk together Thursday, exiting the International Space Station almost eight months after moving in.
The President has asked SpaceX to bring home the two astronauts stranded on the ISS as soon as possible. We will do so.
SpaceX, led by Elon Musk, will assist in returning NASA astronauts Sunita Williams and Barry Wilmore, who have been stranded ...