Retroviruses carry their genetic blueprint in the form of RNA, which they use to synthesize DNA—the reverse of the usual process. This makes it possible for their genetic material to become a permanent part of the genes of an infected cell. An endogenous retrovirus is a retrovirus-like sequence found in an organism's genome that is thought to constitute the remains of a true retrovirus absorbed through evolution. In humans, endogenous retroviruses are suspected of involvement in what diseases?
W. Somerset Maugham
Back in the day
Known for his wartime valor, Dózsa was tasked with leading an army for Pope Leo X's crusade in 1514. Though he assembled some 100,000 peasants, plans for the crusade were suddenly suspended. The peasants refused to disband, deciding instead to avenge mistreatment by their landlords. Rebellion quickly became full-scale revolution, with Dózsa's troops murdering nobles and burning castles. When the peasants were finally stopped at Temesvár, he was tortured in what bizarre way before being eaten?
Born on a day like today
Hillary was a New Zealand mountaineer who, with Tenzing Norgay of Nepal, became the first to reach the summit of Mount Everest in 1953. Following the expedition, Hillary founded the Himalayan Trust, which built many schools and hospitals for the Sherpa people of Nepal. He continued climbing, later participated in the first crossing of Antarctica by vehicle, and even searched for the legendary abominable snowman in 1960. What unusual profession did Hillary have when not mountaineering?