Picture of Democritus
The Bettmann Archive
Democritus was a Greek philosopher who lived between 470-380 B.C. He developed the concept of the 'atom', Greek for 'indivisible'. Democritus believed that everything in the universe was made up of atoms, which were microscopic and indestructible.
Democritus had many remarkable insights for his time. He understood that the Milky Way was a large collection of stars and also thought that space was limitless.
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