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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.