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The Sleepy History of the Universe

Get Sleepy: Sleep meditation and stories

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The Origins of Early Matter

After most of the matter and antimatter was annihilated, the leftover matter was scattered around the expanding cosmos. There were not even molecules or atoms; there were just infinitesimally tiny particles of matter that scientists call quarks. These unbelievably miniscule particles now make up the protons, electrons and neutrons that form atoms.

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