New research warns that if we don't hit an asteroid in exactly the right spot, it could end up on a collision course with ...

Spotting a concussion can be tricky. After a potential head injury, you can ask if the person feels dizzy or has a headache—but that relies on self-reporting, which isn't always accurate.

SpaceX conducted a static fire test of the flight 6 Starship at their Starbase facility in South Texas. Credit: SpaceX | edited by Space.com's Steve Spaleta ...