NASA astronauts Scott Kelly and Terry Virts conduct Rodent Research investigations within the Microgravity Science Glovebox and the Rodent Habitat Module aboard the International Space Station. | NASA

NASA Tests Implantable Device in Effort to Curb Astronaut Muscle Loss

The device, currently being tested on mice aboard the International Space Station, is designed to deliver medication to reduce deterioration in muscle mass among astronauts — and potentially for people on Earth.