Add Yahoo as a preferred source to see more of our stories on Google. The ancient Greeks conceived of five building blocks of matter – from bottom to top: earth, water, air, fire and aether. Aether ...

Detection by Askaryan Radio Array holds promise for future research into sources, nature of cosmic rays and neutrinos ...

The windy and chaotic remains surrounding recently exploded stars may be launching the fastest particles in the universe. Highly magnetic neutron stars known as pulsars whip up a fast and strong ...

Illustration of an array of ground-based detectors to characterize a cosmic ray shower. When high-energy cosmic particles strike the atmosphere, they produce a cascade of particles. By building a ...

New observations help astronomers hone in on a long-standing mystery about where cosmic rays come from. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

One of the biggest mysteries of the universe is why its expansion seems to be speeding up. Physicists have attributed it to a strange force called dark energy, but exactly how it works is largely ...

For decades, scientists have been trying to solve a vexing problem about the weather in outer space: At unpredictable times, high-energy particles bombard the earth and objects outside the earth’s ...

It might be true that there's an ultimate speed limit to everything in the Universe — the speed of light in a vacuum — but that doesn't mean there's a limit to how energetic a single particle can be.

Scientists have identified low-energy particles lurking near the Sun that likely originated from solar wind interactions well beyond Earth orbit. NASA's Parker Solar Probe is venturing closer to the ...

Neutrinos are so tiny, so nearly massless, that they’re very difficult to isolate. But we know for sure that they’re produced ...

Astrophysicists show how and when specific particles form and offers clues to questions that have troubled scientists since the 1940s. For decades, scientists have been trying to solve a vexing ...