The philosopher Plato wrote about the concept of "nothing" in his work "Parmenides." In this dialogue, Parmenides explores the nature of being and non-being, questioning the idea of nothingness and its implications for existence.

Parmenides discovered that the earth was round by the earth's shadow

Aristotle was influnced greatly by Plato who was influenced by parmenides. look it up, there's a bunch of things on Plato and parmenides.

Parmenides' only known work is a poem known as On Nature.

Parmenides, Socrates, Plato, Heraclitus, and Democritus.