You know all those excuses you have for not training for a marathon? Your bad knee, your crazy work schedule, your inability to stop binge watching "The Office" on Netflix? Well I take your earthly excuses and raise you the way better excuse of being on the International Space Station. That's a really, really good reason not to run a marathon.
But it's not a good enough excuse for astronaut Tim Peake, a Brit on a mission. Two missions, actually, since his first mission is the whole being an astronaut who lives in space thing. The second mission is that he's running a marathon.