Retired astronaut Chris Hadfield chats about the existence of aliens and extraterrestrial life. Hadfield is the first Canadian astronaut to walk in space and the best-selling author of "An ...

While the other astronauts are sleeping, Chris Hadfield makes a music video tribute to David Bowie and comes back to Earth a viral sensation. National Corporate funding for NOVA is provided by ...

Show more Colonel Chris Hadfield is a former fighter pilot who became an astronaut and served as a commander of the International Space Station (ISS). While in orbit he became a social media star ...