The ISS Will Fall From the Sky After the End of the Decade. What Will Replace It? | Science

Right now, the International Space Station is orbiting the Earth every 90 minutes from around 250 miles above the surface on average at a breakneck speed of 17,500 miles per hour. For more than two decades, the station has served as a microgravity research center, which scientists have used to investigate Alzheimer’s disease and cancer, study our planet