
Physics
Thorium nuclear clock ticks steadily for 24 hours
A Vienna-led team kept a thorium clock's laser steady for more than a day with no conventional atomic clock holding it in place.

Physics
A Vienna-led team kept a thorium clock's laser steady for more than a day with no conventional atomic clock holding it in place.

Space
On Oct. 11, 1968, Wally Schirra, Donn Eisele and Walter Cunningham launched on the mission that rebooted the Apollo program after the Apollo 1 fire.

Space
NASA Administrator Jared Isaacman will fly one of three F-5 fighter jets over MetLife Stadium before the Jets-Browns game as part of the agency's Inspiration Tour.

Space
Space.com reports on a new engineered microbe that can live off simulated Martian dirt and make materials for a Mars city.

Space
Season 2 of the Apple TV thriller moves beyond the 2016 novel, and showrunner Blake Crouch tells Space.com what that required.

Missions
A new NASA-funded investigation aims to confirm whether a lunar pit is connected to a vast underground lava tube.