https://www.urbo.com/content/things-about-being-an-astronaut-that-nasa-doesnt-talk-about/
https://www.buzzfeednews.com/article/alexkasprak/astronaut-secrets#.eeOwL2G9zn
https://arstechnica.com/science/2013/03/swimming-with-spacemen/
https://gizmodo.com/how-chris-hadfield-made-us-care-about-astronauts-again-504479419