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Most normal matter in the universe isn't found in planets, stars or galaxies – an astronomer explains where it's distributed
But the Big Bang theory predicts that about 5% of the universe's contents should be atoms made of protons, neutrons and ...
In 1867, Lord Kelvin imagined atoms as knots in the aether. The idea was soon disproven. Atoms turned out to be something else entirely. But his discarded vision may yet hold the key to why the ...
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