The deadliest earthquake on record and the fifth deadliest natural disaster in history, the Shaanxi earthquake of 1556 killed approximately 830,000 people in inner China. The quake destroyed an area spanning 520 miles, and aftershocks continued to rock the region several times a month for half a year. Contributing to the high death toll on the Loess Plateau was the fact that millions of people lived in artificial caves that were destroyed by landslides. What was the earthquake's magnitude?
Back in the day
The Public Library of Science (PLoS) is a nonprofit open-access scientific publishing project aimed at creating a library of scientific journals and other scientific literature under an open content license. All of the content of PLoS journals is published under the Creative Commons "attribution" license. What Nobel Prize winner in Physiology or Medicine helped found PLoS?
Born on a day like today
The first female prime minister of Great Britain, Thatcher served longer than any other British prime minister in the 20th century. She is noted for policies that dismantled many aspects of Britain's postwar welfare state and privatized many state-run industries. By 1990, interest rates had risen to 15%, undermining her core voting base and contributing, along with internal party disputes over the poll tax and European integration, to her 1992 retirement. Why was she called the "Iron Lady"?