Much of the universe's regular "baryonic" matter is spread through intergalactic space and in diffuse halos around galaxies, ...

Between 50 and 1,000 kilometers above our heads is the ionosphere, a layer of Earth's upper atmosphere consisting of charged particles: ions (atoms that have gained or lost a negatively charged ...

Recently, a group of scientists at the University of Pennsylvania, have detected mysterious radio signals, that seem to ...

The wind, having tumbled down 4,000 feet of elevation from the domed summit of the ice sheet hundreds of miles to the west, ...

The collapse of the world’s second-largest ice sheet would drown cities worldwide. Is that ice more vulnerable than we know?

Scientists are puzzled after a cosmic particle detector flying high above Antarctica picked up a series of strange ...

A balloon-borne experiment over Antarctica, designed to detect cosmic radio waves, has instead picked up bizarre signals that appear to be coming from deep within the ice. These signals challenge our ...

A mysterious discovery under Antarcticas ice is shaking up physics. Researchers using ANITA detected unexplained radio waves ...

Neutrinos are ghostly particles—no charge, barely any mass, and yet they flood the cosmos. Born in places like the Sun, ...

A cosmic particle detector in Antarctica has emitted a series of bizarre signals that defy the current understanding of ...

Models suggest that human-caused global warming would have been detectable in the 19th century with today's know-how.

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...