Uranium is a naturally radioactive element. It powers nuclear reactors and atomic bombs.
These stomp rockets are a fun way for kids to compete, while also helping explain physics.
The Endurance Expedition was a failed mission to cross the Antarctic on foot, leaving 28 explorers stranded.
A SpaceX Falcon 9 rocket successfully launched 48 new Starlink internet satellites into orbit in the company's 10th launch in as many weeks.