The United States has been at the epicenter of the planet’s most unusually cold conditions early in 2025. The polar vortex is to blame.

Mars may once have held enough water to fill oceans and form coastlines. The planet’s red dust contains water and likely formed in cold conditions.

Artist's concept of a potentially habitable super-Earth orbiting a star called HD 20794. Illustration credit: Gabriel Pérez ...

Astronomers should search for technosignatures on planets that are not conducive to life. Harvard astronomer Avi Loeb ...

IT’S been nearly 40 years since the first planet outside of our Solar System was discovered. Since then, more than 5,800 weird and wonderful worlds across 4,300 planetary systems have been ...

It’s really, really cold again — as the US shivers through ... What they do have consensus on is that winter is getting warmer as the planet warms because of fossil fuel pollution, so this ...

This suggests that Mars’ rusting process began when the planet still had liquid water on its surface. Its presence ... is exposed to oxygen, often in cold environments like glaciers or icy ...

"The small deformation rates indicate that the upper mantle of Mars is cold, highly viscous and ... of depression and rebound on the Red Planet's surface and interior. The result?

The conclusion suggests that Mars may have rusted earlier in history than previously thought, during a time when water was still present on the surface ... the planet had a period of cold and ...

Using state-of-the-art equipment, as well as firsthand analyses of Martian dust from the red planet’s surface ... the ferrihydrite “formed during a cold, wet period on early Mars under ...

The planet was once more hospitable, characterized by a warm and wet climate with liquid oceans. But today Mars is cold and dry, with most water now located below the surface. Understanding how ...