Achilles was only able to be harmed on his heel. When he was born, his mother, Thetis, wanted to make him immortal and so dipped him in the River Styx, holding only his heel above the water. It is helpful to remember that the back of your heel is where the Achilles tendon is located. Doctors know Greek mythology too!

King Odysseus designed the Trojan Horse. King Odysseus was widely considered one of the smartest of the Greek kings, and it was through his ingenuity that the fake Trojan Horse was thought up and delivered to the Trojans, leading to their ultimate defeat at the hands of the Greeks.

Daedalus's son was Icarus. In order to keep the design of the Labyrinth a secret, King Minos had imprisoned Daedalus and his son in a high tower. Daedalus designed the wings for him and his son to escape the tower, cautioning his son not to fly too high or the wax would melt. Icarus didn't listen to his father's warnings, and died during the escape when he flew too close to the sun.

None of the muses carried a paint easel. The arts inspired by the Muses were mostly related to history, science, and various forms of poetry (epic, love, and tragic). Though painting was certainly an important part of Ancient Greek art, particularly in the form of frescoes in Crete, it was not one of the art forms embodied in the Muses. 

The food of the gods was ambrosia. In many Greek myths mortals tried to steal ambrosia in order to become immortal - at the conclusion of his labors, the goddess Athena offered ambrosia to the hero Heracles as part of his journey to immortality. Ambrosia is also often referred to as the "nectar of the gods," and even now the term "ambrosia" is used to mean a food that is particularly good tasting or smelling. 

Heracles was NOT asked to defeat the monster Charybdis. Charybdis was a sea monster, commonly pictured as a giant whirlpool that Odysseus had to navigate on his way back from the Trojan War. 

Zeno founded the first school of Stoicism in Athens in the third century BCE. Zeno’s work was carried on by his successor, Cleanthes. Together, these two men are responsible for the emergence of Stoicism as one of the leading philosophical disciplines of the classical Greco-Roman world.

Epicureanism is a philosophy that was developed in ancient Greece by the philosopher Epicurus. It was founded in the late-fourth century BCE. Epicureanism emphasizes the pursuit of pleasure through the acquisition of knowledge and through moderate living. It is often misunderstood as a sort of hedonism, but Epicurus actually advocated for a much stricter style of living.

Stoicism is an ancient Greek philosophy that was established by Zeno, in Athens, in the third century BCE. Stoicism emphasizes personal conduct and the pursuit of knowledge and wisdom. It is often compared and contrasted with Epicureanism. Epicureanism teaches that the pursuit of pleasure is the most important aspect of one’s life. Although, what exactly constitutes “pleasure” is generally misunderstood.

Euclid lived in Alexandria (in Egypt) during the height of Hellenistic rule in Egypt. He is most famous for his contributions to geometry. His most influential work is called Elements and was an instrumental text in the teaching of geometry up to the nineteenth century.