Which Greek philosopher proposed the concept of the 'infinite' as the fundamental principle of the universe?

According to Democritus, what were the smallest units of matter called?

What did Democritus introduce as the concept of 'void' or empty space?

Which Greek philosopher had a deterministic view of the universe, believing that everything was the result of the interaction of atoms in a mechanical fashion?

Who proposed a geocentric model of the universe and categorized matter into four elements: earth, water, air, and fire?

Which Greek mathematician made significant contributions to understanding the geometry of the universe?

Who proposed a heliocentric model of the solar system, placing the sun at the center?

What did Anaximander propose as the fundamental principle of the universe?

According to Heraclitus, what was the fundamental nature of the universe?

Who among the Pre-Socratic philosophers believed that air was the fundamental substance of the universe?

Which Greek philosopher believed that fire was the fundamental principle of the universe?