When you think of it, mundane tasks become quite complicated without our good old friend gravity. Take for example washing your hands. In space, the water will not run down your hands but will float. How then do you wash your hands in space? This video shows how astronauts do it. (Also, it’s cool how he doesn’t need to put down the microphone to do something else with his hands. That’s another example how different it really is outside Earth.) This could be a learning experience when someday we’ll go to Mars, assuming our current generation is still alive by then.