20 female mice were transferred to the International Space Station with the spacecraft SpaceX CRS-4 Dragon. During this the NASA study, mice showed various changes in their behavior. After 7-10 days, younger mice began to spin round in the cage, which evolved into a coordinated group activity. This activity may represent stereotyped motor behavior of mice in such an exercise wheel, or vestibular sense acquired since been adapted to the environment. briefly, mice learned in a few days how to move through a microgravity environment.