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Why is the sky blue? Weather science

By |2017-08-20T23:42:12+00:00August 20th, 2017|Physics|

Blue sky with cirrus clouds This is an easy question to ask but the answer is pretty hard. The light that comes from the Sun to Earth looks white, but really it is made up of all different colors of light mixed together. You can see this by using a glass of water or a glass prism to break up [...]

Rainbows and water – a sun project

By |2018-05-31T11:49:25+00:00August 18th, 2017|Physics|

Sunshine through the clouds and Earth's atmosphere You can see that the sunlight that reaches the Earth travels at different wavelengths. On a sunny day, put a full glass of water (a real glass glass) in the sunshine on your windowsill. Look where the sunshine goes through the water, and you should see rainbows on the floor or walls. [...]

Emilie du Chatelet – European philosophy

By |2018-04-08T11:14:27+00:00August 7th, 2017|Modern Europe, Philosophy|

Emilie du Chatelet, a French philosopher in the 1700s Emilie du Chatelet's rich father, who was interested in literature and science, hired tutors to homeschool her, instead of sending her to a convent school. She learned Latin, German, Greek, and Italian, as well as math and science. When du Chatelet was 18, she married [...]

Medieval Islamic science

By |2018-04-24T08:21:20+00:00July 27th, 2017|Islam, Science|

Al Tusi's diagram of linear motion from circular motion In the Early Middle Ages, before the formation of the Islamic Empire, Buddhists ran the world's biggest universities. One was in India, at Nalanda. Another was in what is now Pakistan, at Taxila. In Egypt, the University of Alexandria was still an important center of learning, too. Most serious scholars went to [...]

Who were the Norse gods?

By |2017-06-29T02:10:43+00:00June 29th, 2017|Northern Europe, Religion|

A Viking religious sacrifice (ca. 900 AD, Sweden) From their first appearance in historical literature around 100 BC, the Germans were polytheistic. They believed in many gods, just like the Greeks and the Romans and the Persians and the Indians and other Indo-European people. In fact, the most important German gods are closely [...]