ISS: American spacewalkers Cassada and Rubio ventured outside the space station Tuesday

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and moreπŸ‡§πŸ‡· CNN πŸ‡§πŸ‡· The first in a series of end-of-the-year spacewalks kicked off Tuesday morning outside the International Space Station. First-time spacewalkers and NASA astronauts Josh Cassada and Frank Rubio began their excursion outside the space … Read more

Meet the International Space Station’s new diverse crew

A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here. CNN β€” When astronauts venture aboard the International Space Station, they see a world without borders. They work together while orbiting Earth, and no boundaries are visible between them, even as member … Read more