On October 25, 1836, construction began on the Wilmington and Raleigh Railroad to connect the port city of Wilmington with the state capital of Raleigh. In 1849 the North Carolina Railroad was created by act of the legislature to extend that railroad west to Greensboro, High Point, and Charlotte. During the Civil War, the Wilmington-to-Raleigh stretch of the railroad would be vital to the Confederate war effort; supplies shipped into Wilmington would be moved by rail through Raleigh to the Confederate capital of Richmond, Virginia.
The Wilmington and Raleigh Railroad was going to connect Wilmington to what city?
Raleigh

The city of Nanjing was razed after the Sui dynasty took over it. It renamed Shengzhou () in Tang dynasty and resuscitated during the late Tang. It was chosen as the capital and called Jinling () during the Southern Tang (937976), a state that succeeded Wu state. It renamed Jiangning () in Northern Song dynasty and renamed Jiankang in Southern Song dynasty. Jiankang's textile industry burgeoned and thrived during the Song dynasty despite the constant threat of foreign invasions from the north by the Jurchen-led Jin dynasty. The court of Da Chu, a short-lived puppet state established by the Jurchens, and the court of Song were once in the city. Song was eventually exterminated by the Mongol empire under the name Yuan and in Yuan dynasty the city's status as a hub of the textile industry was further consolidated.
What was the name of the short-lived puppet court created by the Jurchens?
The court of Da Chu

Hydrogen was liquefied for the first time by James Dewar in 1898 by using regenerative cooling and his invention, the vacuum flask. He produced solid hydrogen the next year. Deuterium was discovered in December 1931 by Harold Urey, and tritium was prepared in 1934 by Ernest Rutherford, Mark Oliphant, and Paul Harteck. Heavy water, which consists of deuterium in the place of regular hydrogen, was discovered by Urey's group in 1932. Francois Isaac de Rivaz built the first de Rivaz engine, an internal combustion engine powered by a mixture of hydrogen and oxygen in 1806. Edward Daniel Clarke invented the hydrogen gas blowpipe in 1819. The Dobereiner's lamp and limelight were invented in 1823.
Who was the first to discover deuterium?
Harold Urey