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Dark Matter Makes Up a Quarter of the Universe, But What Is It?

10:00 EST 13 Nov 2017 | Sinngularityhub

Until the 1960s, scientists thought ordinary matter and radiation made up everything in the universe. Then a young physicist named Vera Rubin made a discovery that shook things up. Rubin uncovered an unexpected relationship between the speed that galaxies rotate and the mass they contain. She observed the rotational speed of many galaxies suggested there […]

Original Article: Dark Matter Makes Up a Quarter of the Universe, But What Is It?

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