A new study, published in the journal Physical Review Letters, suggests that some of the highest-energy cosmic rays could ...

For more than a century, physicists have watched particles rain down from space carrying energies that dwarf anything a ...

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 ...

High-energy cosmic rays, 10 million times more powerful than particles accelerated in Earth's strongest atom smasher, may ...

Scientists studying mysterious ultra-powerful cosmic rays have uncovered a surprising hidden pattern that could finally help ...

There may be an ultraheavy explanation for the mystery surrounding the origins of the highest-energy particles ever observed.

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 ...

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 ...

Researchers at Penn have created a hybrid light-matter particle that could dramatically speed up AI computing while using far ...

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.