Some think it was called this because of how the skin turned dark at the late stages of the disease, but it was more likely called "Black" to reflect the dark and horrible time in history.
He invented the Bolometer. An instrument capable of detecting minute differences in temperature
In 1828 Andrew Jackson became the 7th President of the United States and the new political party system started- the leader of the new Democratic Party
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2.On 11 December 1941, four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response to what was claimed to be a series of provocations by the United States government when the U.S.
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Mansa Musa, fourteenth century emperor of the Mali Empire, is the medieval African ruler most known to the world outside Africa. His elaborate pilgrimage to the Muslim holy city of Mecca in 1324 introduced him to rulers in the Middle East and in Europe.
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