Cremation is a widespread practice that dates to at least 26,000 years ago and is, for many, related to a belief in fire's purifying nature. The practice fell out of favor among Christians until the late 19th c, when people began to recognize the health risk posed by overcrowded cemeteries in large urban centers. Though a log pyre was initially used in cremation, modern methods expose the corpse not to flames but to intense heat that reduces the body to ashes. Which religions prohibit cremation?
Back in the day
Radar is a means for detecting the position, movement, and nature of a remote object through radio waves reflected from its surface. During the 1930s, several countries independently developed the technology for military use, exploiting radar's capacity to detect aircrafts and ships. One of the earliest practical radar systems was devised by Sir Robert Watson-Watt, a descendent of the inventor of the steam engine, James Watt. What was the "Battle of the Beams"?
Born on a day like today
Krupskaya was a Russian revolutionary and educator who was a Marxist agitator in the years leading up to the Russian Revolution. She married Bolshevik founder Vladimir Lenin in 1898, while both were serving terms in exile. After the Revolution, she joined the People's Commissariat of Education and helped develop educational systems that offered both academic and professional training to women and workers. Her biography is known as the most detailed account of Lenin's life but omits what events?