Biorhythms are recurring patterns of physiological states in an organism or organ. One example is the circadian rhythm that governs humans' sleep-wake cycle as well as their blood pressure changes and urine production during a 24-hour period. Circannual rhythms are yearly cycles that respond to changes in the length of periods of daylight. Some people believe that biorhythms affect physical and mental states and behavior. Who thought that his students' good and bad days followed a 33-day cycle?
Back in the day
When Leonce Viator, Jr., set out in his boat for a day of fishing on Louisiana's Lake Peigneur, he never imagined he would end up fighting for his life. But that is exactly what happened after an oil rig on the lake's surface accidentally bored through the roof of a salt mine beneath it. Like a bathtub whose plug has been pulled, the lake began draining into the mine, creating a whirlpool that sucked in not just water but barges, trees, and acres of surrounding land. What happened to Viator?
Born on a day like today
Lagerlöf was a Swedish author who is best known for her children's book, The Wonderful Adventures of Nils. While working as a teacher, Lagerlöf got her big break as a writer when chapters of her first novel, Gösta Berling's Saga, won first prize in a literary contest. Lagerlöf rooted her work in legend in a reaction against contemporary Swedish realism. In 1909, she became the first woman to win the Nobel Prize for Literature. What did she do with her medal during World War II?