Live coverage: SpaceX supply ship returns to Earth

The astronauts living aboard the International Space Station snagged a free-flying commercial cargo ship filled with a bounty of supplies and new science this morning, pulling the vessel aboard as the two craft flew in formation 252 miles above the world.

In another first on Mars, an instrument inside NASA’s Perseverance rover has made oxygen out of carbon dioxide sucked in from the planet’s atmosphere, officials said Wednesday. The technology could help future astronauts “live off the land” by generating their own rocket fuel and breathing air.

A companion satellite ejected from China’s orbiting Tiangong 2 research module has snapped unique views of the space lab as two astronauts inside press on with experiments and other tasks in their second week aboard the mini-space station.