Heracles and the Bull. To find out more about the labors of Heracles, see this Wikipedia article: link; for information about the image: image source.
Here you see one of the labors of Heracles: he had to go to the island of Crete, ruled by King Minos, and subdue the Cretan Bull which had been causing havoc and destruction all over the island. Heracles subdued the Bull in hand-to-hand (hand-to-hoof?) combat and brought it back to the Greek mainland, delivering it to King Eurystheus in Athens. The Bull escaped, however, and fled to Marathon - and as the Marathonian Bull, it was captured and sacrificed by the hero Theseus. (And yes, is the same Marathon which gives its name to the race now called a "marathon," the same distance that a messenger ran from the Battle of Marathon to take news back to Athens of the Greeks' victory over the Persian.)
You can also find more myths and legends for the week of Jan. 29 - Feb. 4 here. For more information and links to the actual javascript code, see the Myths & Legends Widget Reference Page.