Simplify the following text for a Grade 9 native English-speaking person.
Original: Samos is the birthplace of the Greek philosopher and mathematician Pythagoras , after whom the Pythagorean theorem is named , the philosopher Epicurus , and the astronomer Aristarchus of Samos , the first known individual to propose that the Earth revolves around the sun .
Simplified: The mathematician Pythagoras was from Samos .