bacteria

6 09, 2017

What is cholera? History of disease and medicine

By |2019-04-01T05:55:51-07:00September 6th, 2017|Biology, Science|Comments Off on What is cholera? History of disease and medicine

History of cholera: Washing clothes in the river (India) Where did cholera get started? Cholera (KOLL-uh-rah) is a very serious sickness. It probably first got started in India. History of disease [...]

20 08, 2017

Why does it rain? Weather – Earth science

By |2017-08-20T18:07:53-07:00August 20th, 2017|Physics|Comments Off on Why does it rain? Weather – Earth science

Thanks to Rocbike for the great picture! When the Earth first formed, about 4.5 billion years ago, it didn't rain here. Until about four billion years ago, Earth was too hot for raindrops to form, [...]

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