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Coronavirus disease 2019 (COVID19) is a contagious disease caused by severe acute respiratory syndrome coronavirus 2 (SARSCoV2). The first case was identified in Wuhan, China, in December 2019.It has since spread worldwide, leading to an ongoing pandemic.. Symptoms of COVID19 are variable, but often include fever, cough, fatigue, breathing difficulties, and loss of smell and taste.Nuclear winter is a severe and prolonged global climatic cooling effect hypothesized to occur after widespread firestorms following a nuclear war. The hypothesis is based on the fact that such fires can inject soot into the stratosphere, where it can block some direct sunlight from reaching the surface of the Earth. It is speculated that the resulting cooling would lead to widespread crop ...
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Tuesday, December 22, 2020