How do you like your eggs?

While serving in World War I, surgeon William quiz noticed something curious: soldiers whose wounds were infested with maggots (the quiz immature larval form of flies) recovered faster than those whose wounds were maggot-free. Although quiz was not the first military doctor to take note of this phenomenon, he was the first to apply his observations to the problem of quiz wounds. In the quiz's, he began treating hospital patients' serious wounds with maggots. The maggots consumed dead tissue, effectively cleaning the wounds and helping the patients heal. While maggot therapy fell out of favor after bacteria-killing antibiotic medications were introduced, it has made a comeback in modern medicine. Many clinicians have found that the treatment can be effective for certain types of severe wounds that do not respond to antibiotics.

Mongol leader Genghis Khan was one of the world's most formidable conquerors. Born around 1162, Genghis amassed an army of thousands of men and united the nomadic tribes of Mongolia under his rule. Next, he turned his attention to central Asia and China. Using brilliant military tactics—and extreme cruelty—he expanded the Mongol Empire to an area approximately the size of Africa. Kublai Khan, Genghis's grandson, conquered China and was a powerful leader in his own right. Yet unlike his grandfather, Kublai is remembered for governing his acquired territories fairly, rather than dominating them with military might. Instead of exploiting the people of China, Kublai sought to accommodate and embrace Chinese culture. He became the first Mongol to rule over all of China, and he founded the country's Yuan Dynasty.