Micrometeorites: More Than 5,000 Tons of Extraterrestrial Dust Falls to Earth Each Year

Astranis, with a new approach to satellite internet, raises $250 million from BlackRock and others as it prepares to launch Alaska commercial satellite on a SpaceX mission later this year

NASA's OSIRIS-REx spacecraft begins its farewell tour of near-Earth asteroid Bennu

Earth nearly lost all its oxygen 2.3 billion years ago