Anaximander\'s Theory of the Origin of the Universe is an ancient Greek philosophical concept that posits that the universe originated from an infinite, indeterminate mass called the "apeiron". According to Anaximander, the apeiron was
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Anaximander was a pre-Socratic Greek philosopher who lived in Miletus, a city of Ionia. He belonged to the Milesian school and learned the teachings of his master Thales. He succeeded Thales and became the second master of that school, where he counted Anaximenes and, arguably, Pythagoras amongst his pupils.