SpaceX’s Dragon cargo craft ended a four-week mission Sunday with a parachute-assisted splashdown in the Pacific Ocean, returning from the International Space Station with more than 3,600 pounds of cargo, blood and urine samples, and specimens from a rodent research experiment aimed at helping patients with catastrophic bone injuries and osteoporosis.

The nearly $1.9 billion BepiColombo mission to Mercury jointly developed by the European Space Agency and the Japan Aerospace Exploration Agency lifted off Friday night from French Guiana aboard an Ariane 5 rocket. Launch occurred at 9:45 p.m. EDT Friday (0145 GMT Saturday).

A European environmental satellite launched Tuesday from Russia’s Plesetsk Cosmodrome to begin a mission of at least seven years measuring the height, color and temperature of the world’s oceans. The Sentinel 3A spacecraft lifted off aboard a Rockot booster at 1757 GMT (12:57 p.m. EST).