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14 08, 2017

Christmas Trees – American holidays

By |2019-12-04T14:57:34-08:00August 14th, 2017|North America, Northern Europe, Religion|0 Comments

A tree in Germany (late 1700s, by Joseph Keller) - History of Christmas trees Evergreens and the winter holidays Because Christmas is related to old celebrations of the winter solstice, evergreen trees have always [...]

7 08, 2017

Enlightenment Science in Europe

By |2019-05-29T07:46:59-07:00August 7th, 2017|Math, Modern Europe, Physics, Science|0 Comments

Gottfried Leibniz, a German mathematician - Enlightenment science What set off the Enlightenment? By 1650 AD, Europeans understood Islamic algebra and trigonometry better. Then they combined that with the exciting invention of the telescope and microscope (thanks to [...]

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