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A photo illustration of the pyramids of Giza in Egypt.

The Great Pyramid of Giza is hiding a huge, unexplored space — and scientists used cosmic rays to find it

Physicists used cosmic rays to penetrate the pharaoh Khufu pyramid's thick rock and discover a void that's about the length of two semitrailers.

A possible hidden force could hold the key to unlocking the mysterious dark universe

It’s pretty widely accepted in physics that the universe is governed by four fundamental forces. But there might just be a fifth force lurking in the shadows.

This particle could explain why you exist — but 1 billion tons of Antarctic ice couldn’t catch it

The sterile neutrino wouldn’t interact with matter at all and would only feel the force of gravity. Detecting it would be like chasing the shadow of a ghost.

The most powerful atom-smasher in the world just turned back on — and it’ll push the boundaries of physics even further

The LHC is kicking atoms and taking names as it hunts for answers to some of the most pressing questions in physics.

The most powerful machine on Earth was just halted by a tiny weasel

The Large Hadron Collider (LHC) at CERN, a 27-kilometer underground ring used to collide particles at nearly the speed of light, suffered a power outage today.