7 years ago
Is Dark Matter Real?
Many science-savvy people take it for granted that the universe is made not only of Carl Sagan's oft-quoted "billions and billions" of galaxies, but also a vast amount of an invisible substance called dark matter. This odd matter is thought to be a new kind of subatomic particle that doesn't interact via electromagnetism, nor the strong and weak nuclear forces. Dark matter is also supposed to be five times more prevalent in the universe than the ordinary matter of atoms.
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