The X-10 Graphite Reactor at Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee, formerly known as the Clinton Pile and X-10 Pile, was the world's second artificial nuclear reactor (after Enrico Fermi's Chicago Pile) and was the first reactor designed and built for continuous operation. Argonne National Laboratory's Experimental Breeder Reactor I, located at the Atomic Energy Commission's National Reactor Testing Station near Arco, Idaho, became the first nuclear reactor to create electricity on 20 December 1951. Initially, four 150-watt light bulbs were lit by the reactor, but improvements eventually enabled it to power the whole facility (later, the town of Arco became the first in the world to have all its electricity come from nuclear power generated by BORAX-III, another reactor designed and operated by Argonne National Laboratory). The world's first commercial scale nuclear power station, Obninsk in the Soviet Union, began generation with its reactor AM-1 on 27 June 1954. Other early nuclear power plants were Calder Hall in England, which began generation on 17 October 1956, and the Shippingport Atomic Power Station in Pennsylvania, which began on 26 May 1958. Nuclear power was used for the first time for propulsion by a submarine, the USS Nautilus, in 1954.
What was the world's first artificial nuclear reactor?
Enrico Fermi's Chicago Pile

A uniquely Creole tradition is the touloulous. These women wear decorative gowns, gloves, masks and headdresses that cover them completely, making them unrecognisable, even to the colour of their skin. On Friday and Saturday nights of Carnival, touloulou balls are held in so-called universities; in reality, large dance halls that open only at Carnival time. Touloulous get in free, and are even given condoms in the interest of the sexual health of the community. Men attend the balls, but they pay admittance and are not disguised. The touloulous pick their dance partners, who may not refuse. The setup is designed to make it easy for a woman to create a temporary liaison with a man in total anonymity. Undisguised women are not welcomed. By tradition, if such a woman gets up to dance, the orchestra stops playing. Alcohol is served at bars – the disguised women whisper to the men "touloulou thirsty", at which a round of drinks is expected, to be drunk through a straw protect their anonymity.
What do men have to do to be allowed into the balls?
pay admittance

Economic and political migrations made an impact across the empire. For example, the Russian and Austria-Habsburg annexation of the Crimean and Balkan regions respectively saw large influxes of Muslim refugees – 200,000 Crimean Tartars fleeing to Dobruja. Between 1783 and 1913, approximately 5–7 million refugees flooded into the Ottoman Empire, at least 3.8 million of whom were from Russia. Some migrations left indelible marks such as political tension between parts of the empire (e.g. Turkey and Bulgaria) whereas centrifugal effects were noticed in other territories, simpler demographics emerging from diverse populations. Economies were also impacted with the loss of artisans, merchants, manufacturers and agriculturists. Since the 19th century, a large proportion of Muslim peoples from the Balkans emigrated to present-day Turkey. These people are called Muhacir. By the time the Ottoman Empire came to an end in 1922, half of the urban population of Turkey was descended from Muslim refugees from Russia.
In what year did the Ottoman Empire end?
1922