Astronauts leave one place on the ISS filthy as an experiment

Living in space is hazardous and requires things to be precise and Squeaky clean. Part of the tasks astronauts perform when living aboard the space station is to keep most surfaces in areas squeaky clean, but there is one area that’s left filthy for science. Astronauts aboard the ISS clean every Saturday, wiping down surfaces, vacuuming, and collecting trash. One …