Ask An Astronaut All Your Questions About Life Aboard the Space Station

Last week, Astronaut Butch Wilmore was on the International Space Station. This afternoon, he's right here answering your questions. He and Niki Werkheiser, head of NASA's 3D printing project, can talk about 3D printers in space, life aboard the ISS, and anything else you want to know! » 3/19/15 12:06pm 3/19/15 12:06pm