Experiment on International Space Station part of effort to create lab-grown 'slaughter free' meat and aims to show it can be done without access to Earth's resources
In 'milestone' for women in space, Jessica Meir and Christina Koch to venture out on October 21 to work on International Space Station's solar power system
Researchers study Scott Kelly, who spent a year on the International Space Station, and his identical twin Mark Kelly, also a former NASA astronaut, who stayed on the ground
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