China announces plan to build early-warning system for dangerous asteroids

NASA taps SpaceX to launch the telescope that could unlock new worlds

Physicists created a tiny universe where time emerged without a clock

Physicists have constructed a lab-based 'mini-universe' to demonstrate how time can emerge without the need for a clock.

Astronomers scrutinize exoplanet that survived the death of its star

High‑altitude mouse found near 7,000 meters may redefine mammal survival limits

The discovery of the Andean leaf-eared mouse thriving at 6,700 meters is challenging established beliefs about mammal survival limits.

'What we found was striking': Physicists detect new kind of signal from a black hole's 'point of no return'

Physicists have detected a previously unknown type of gravitational wave signal emanating from a black hole's event horizon.

Leap Seconds Were a Headache. Now Timekeepers Are Considering a Leap Hour

International timekeepers are weighing a transition from the leap second to a leap hour to reform how the world tracks time.