Onboard the International Space Station (ISS), mutant mice have been the focus of significant research. These studies explore the effects of microgravity on muscle and bone mass. Muscular MiceIn December 2019, a group of about forty female mice left Earth for the International Space Station (ISS). To study the effects of life in microgravity on muscle and bone mass. According to the findings, the control group mice lost up to 18% of their muscle and bone mass during their stay.