According to the commentators, Virgil received his first education when he was five years old and he later went to Cremona, Milan, and finally Rome to study rhetoric, medicine, and astronomy, which he soon abandoned for philosophy. From Virgil's admiring references to the neoteric writers Pollio and Cinna, it has been inferred that he was, for a time, associated with Catullus' neoteric circle. However schoolmates considered Virgil extremely shy and reserved, according to Servius, and he was nicknamed "Parthenias" or "maiden" because of his social aloofness. Virgil seems to have suffered bad health throughout his life and in some ways lived the life of an invalid. According to the Catalepton, while in the Epicurean school of Siro the Epicurean at Naples, he began to write poetry. A group of small works attributed to the youthful Virgil by the commentators survive collected under the title Appendix Vergiliana, but are largely considered spurious by scholars. One, the Catalepton, consists of fourteen short poems, some of which may be Virgil's, and another, a short narrative poem titled the Culex ("The Gnat"), was attributed to Virgil as early as the 1st century AD.
Which three studies did Virgil abandon for philosophy?
rhetoric, medicine, and astronomy

His answer was that in many cases animals exist with intermediate structures that are functional. He presented flying squirrels, and flying lemurs as examples of how bats might have evolved from non-flying ancestors. He discussed various simple eyes found in invertebrates, starting with nothing more than an optic nerve coated with pigment, as examples of how the vertebrate eye could have evolved. Darwin concludes: "If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down. But I can find out no such case."
What example did Darwin give of eyes evolving?
simple eyes found in invertebrates, starting with nothing more than an optic nerve coated with pigment

When Zeus struck down Apollo's son Asclepius with a lightning bolt for resurrecting Hippolytus from the dead (transgressing Themis by stealing Hades's subjects), Apollo in revenge killed the Cyclopes, who had fashioned the bolt for Zeus. Apollo would have been banished to Tartarus forever for this, but was instead sentenced to one year of hard labor, due to the intercession of his mother, Leto. During this time he served as shepherd for King Admetus of Pherae in Thessaly. Admetus treated Apollo well, and, in return, the god conferred great benefits on Admetus.
Why did Zeus strike down Asclepius with a lightning bolt?
for resurrecting Hippolytus from the dead