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An illustration of a blazar, or spinning black hole that gobbles up matter and shoots out jets of high-energy radiation and particles.

A ghostly particle detected in Antarctica has led astronomers to a super-massive spinning black hole called a ‘blazar’

The origin of the universe's most powerful cosmic rays, or high-speed particles, has been difficult to determine since their discovery about 100 years ago. Astronomers recently used ghostly particles called neutrinos to verify that rapidly spinning black holes called blazars emit cosmic rays.

Flying in airplanes exposes people to more radiation than standing next to a nuclear reactor — here’s why

Pilots and flight attendants get pummelled by cosmic rays and solar storms while keeping you safe and serving you drinks.
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.

Scientists have discovered a potentially suicidal problem with going to Mars

Based on a study in mice, the risk of cancer on Mars could be twice as high as researchers previously thought.

2 nearby exploding stars might have had some surprising effects on our planet

An explosion close enough to Earth would bombard us with radiation, causing mutations as well as potentially catastrophic climate shifts.

This awesome experiment is bringing us closer than ever to solving a 100-year-old cosmic mystery

This very second, high energy particles from outer space are racing towards us at nearly the speed of light.