The curious minds at What If explore what would happen if a nearby supernova exploded close to Earth, revealing radiation exposure, atmospheric disruption, and mass extinctions.

America’s top foreign ally has demanded Donald Trump apologize for dismissing NATO’s role in Afghanistan, describing the U.S.

With severe cold hitting much of the country, some unusual phenomena like "exploding trees" could be on the way. Here's what ...

In 2025, the ocean absorbed an extra 23 zettajoules of heat energy in 2025, breaking the ocean heat content record for the ...

Earth is experiencing a severe solar radiation storm, the strongest in two decades. This event is disrupting satellite ...

Where some cities fade away with time, others are deliberately erased and destroyed. Deep within Central Asia, a chilling ...

The sun exploded with a powerful X1.9 flare on the evening of January 18, launching a huge blob of solar material, known as a ...

A NOAA forecast has Northern Lights visible in northern U.S. states overnight on Monday, Jan. 19 through Tuesday, Jan. 20, as ...

Streaks of shimmering green and red bands exploded in the dark skies above Alaska’s largest city Tuesday. The stunning aurora ...

Optical proof of a tiny companion orbiting supergiant star Betelgeuse is hard to come by. Hubble just spotted new evidence.

Active travel is more popular than ever and there are more great choices. So if you want to hike, bike, paddle or explore the ...

The UK has been warned to expect a "severe" solar storm after the Sun blasted a powerful X-class solar flare in Earth's ...