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The human heart shrivels away in space, but researchers have found that mini-hearts grown from human stem cells sprout in space significantly faster than in labs on Earth.

The Ucayali River snakes across the rainforest in this image captured by NASA astronaut Jessica Meir from the International Space Station.

Fuzzy, purple, and edible, Spudnik is a marvel.

Russia launched its latest Progress cargo ship toward the International Space Station from Baikonur Cosmodrome on Saturday (April 25).

NASA's Jessica Meir spotted the Lyrids from aboard the space station.

For a few moments on April 6, the four Artemis 2 moon astronauts and the three crewmates aboard China's Tiangong space station were farther away from each other than any humans had ever been.

Two NASA astronauts had some fun during the ISS' capture of a robotic cargo spacecraft on April 13, pretending to hold onto it from into the station.

Astronauts aboard Artemis 2 and the ISS connected across a record-breaking Earth–moon distance in the farthest crew call ever made in space.

The uncrewed Northrop Grumman Cygnus XL spacecraft, the S.S. Steven R. Nagel, arrived at the International Space Station on Monday (April 13), bringing with it about 11,000 pounds of supplies.

Northrop Grumman's second "Cygnus XL" cargo ship launched toward the International Space Station on Saturday morning (April 11).