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What is yellow fever? – History of medicine

By |2018-04-15T17:01:43+00:00September 7th, 2017|Africa, Science|

Kids with yellow fever in Mississippi about 1870. See how all the people are white? The hospital wasn't letting black kids in, or hiring black women as nurses. The virus that causes yellow fever probably evolved from an earlier virus that didn't make people sick. The first cases of yellow fever may have been in East or Central [...]

What are hurricanes? Weather science

By |2018-09-10T10:05:35+00:00August 20th, 2017|Physics|

A hurricane in Cuba What is a hurricane? A hurricane (also called a typhoon or a cyclone) is basically a huge spinning wind. Okay, then why is there wind? How do hurricanes get started? Hurricanes form in the summer and especially in the fall, because they can only form where there is cold air high over warm [...]

Spain loses her colonies – 1800s

By |2018-04-28T17:48:29+00:00August 6th, 2017|History, Modern Europe|

Maria Christina Spain was among the first Western countries to get colonies in the 1500s, and it was among the first to lose its colonies in the 1800s. In 1810, Chile declared independence. Then in 1821, Mexico and Peru became independent too. At the same time, Spain began to rock back and forth between democracy and [...]

History of Angola – African History

By |2018-04-19T15:03:13+00:00May 24th, 2017|Africa, History|

Kingdom of Ndongo In 1500 AD, some of the people who lived in what is now Angola were Bantu and some were San. A Bantu man from Congo, Kiluanje, probably started the kingdom of Ndongo there. Ndongo was sometimes pretty much independent, but at other times the rulers of Kongo also ruled Ndongo. Ndongo's capital [...]