There’s evidence that quarks have passed through the Earth, giving scientists proof they really exist. Quarks are a strange form of matter that scientists think was created after the Big Bang, and are so dense that a piece the size of a human cell would weigh a ton. However, not every scientist agrees they’re real.

Physicists teamed up with seismologists to search for traces of quarks that might have passed through the Earth at supersonic speed and released the energy of a 50-kiloton nuclear bomb, causing earthquake-like tremors.
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