The International Space Station’s population is back down to seven as Monday saw the departure of NASA’s SpaceX Crew-7. The quartet’s return to Earth marks the end of their six-month microgravity research mission. Ahead of departure, Mogensen passed over command of the orbiting laboratory to cosmonaut Oleg Kononenko on Sunday, March 10. In the Columbus Laboratory Module, first-time station resident Jeanette Epps set up Kubik, a controlled-temperature incubator that