When Pythagoras was about 18 years old, he went to the island of Lesbos where he worked and learned from Anaximander and Thales of Miletus. Thales had visited Egypt and he recommended that Pythagoras go to Egypt. Pythagoras arrived there around 547 BCE when he was in his early twenties. He stayed in Egypt for 21 years and learned a variety of things, probably including some geometry that is routinely credited to the Greeks.

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