Astronomy
Astronomers study stars, planets, and other heavenly bodies. Aristachus, an astronomer from Samos, claimed that the Sun was the center of the universe and that the Earth circled the sun. Other astronomers at the time rejected the idea, thinking the Earth was the center of the universe. Another astronomer, Eratosthenes, was in charge of the library at Alexandria. He concluded that the Earth is round. He used his knowledge of geometry and astronomy to measure Earth's circumference.
Math and Science
Euclid is one of the most famous Greek mathematicians. His best know book, Elements, describes plane geometry. Plane geometry is the branch of mathematics that shows how points, lines, angles, and surfaces relate to one another.
The most famous scientist of the Era was Archimedes of Syracuse. He worked on solid geometry, or the study of spheres and cylinders. He also figured out the value of pi. He was also an inventor. He designed catapults.
The most famous scientist of the Era was Archimedes of Syracuse. He worked on solid geometry, or the study of spheres and cylinders. He also figured out the value of pi. He was also an inventor. He designed catapults.