beneath the skin.

However, Empedocles of Akragas (c. 495 - c. 435 BCE), is best known for having selected all elements as his archai and by the time of Plato (427-347 BCE), the four Empedoclian elements were well established. In the Timaeus, Plato's major cosmological dialogue, the Platonic solid he associated with fire was the tetrahedron,