On This Day🌄 September17

Battle of Britain Day in Canada (2017)

Constitution Day in the United States

1683 – Antonie van Leeuwenhoek (pictured) wrote a letter to the Royal Society describing "animalcules" – the first known description of protozoa.

1862 – American Civil War: Almost 23,000 total casualties were suffered at the Battle of Antietam near …

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