New Horizons Wakes Up, Prepares for 'Termination Shock'

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

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.

Scientists Say This Climate Hack Could Stop El Niño Before It Starts