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West Asian mathematics – history of math

By |2018-05-10T10:12:08-07:00September 16th, 2017|Science, West Asia|

History of math: Sumerian multiplication table (2700 BC) Cuneiform multiplication table Once people in West Asia figured out how to write down numbers, about 3500 BC, they quickly began to want to use cuneiform to write down other mathematical ideas. (Read more about the invention of numbers) The earliest example of this that we have is from about 2700 BC. It [...]

Science in Central America and South America

By |2019-03-08T20:46:38-07:00September 10th, 2017|Central America, Science, South America|

A rubber ball made by the Olmec people (about 1000 BC) Invention of rubber With different natural resources available to them, the people of South America and Central America invented different things than the people of Europe, Asia, or Africa did. Early African science South America articles Central America articles One early invention was rubber. The Olmec people invented rubber (in fact the [...]

Eclipse of the sun – Astronomy

By |2019-05-24T05:13:20-07:00August 18th, 2017|Physics|

Eclipse of the sun, showing the corona Why do eclipses happen? An eclipse of the sun happens whenever the moon gets between the Earth and the sun, so that the moon blocks your view of the sun. What is the sun made of? More about the moon Eclipse of the moon All our physics articles Depending on where [...]

Eclipse of the sun project – Astronomy

By |2018-05-31T11:49:16-07:00August 17th, 2017|Physics|

(not to scale)Thanks to The Fraudulent Volcano blog To see how an eclipse happens, get a flashlight or a candle (to be the sun). Get an orange (to be the Earth). And get a ball about 1/4 the size of the orange (to be the moon). Put the orange and the ball on a table about eight inches apart from [...]

Ghost Dance – Native American religion

By |2017-08-14T14:33:35-07:00August 14th, 2017|History|

Wovoka, a Paiute man By the late 1800s AD, the United States and Canadian armies forced most of the people who had hunted bison on the Great Plains to move to reservations. The reservations were on terrible land. They were deserts with no water. And now that the bison had all been killed, people had no way to [...]

Who was Thales of Miletus? Greek Astronomy

By |2018-04-23T14:20:25-07:00July 18th, 2017|Greeks, Science|

Thales of Miletus might have watched plays in this theater at Miletus (before it had stone seats) Biography of Thales Thales was born in what's now Turkey, in the city of Miletus, about 630 BC, during the Archaic period. At that time, Miletus was a city where people spoke Greek, though it may have paid taxes or [...]

Who was Anaxagoras? Greek scientist

By |2019-01-26T12:15:15-07:00July 18th, 2017|Greeks, Science|

Anaxagoras came from Clazomenae: A map showing Clazomenae Where was Anaxagoras from? Like Thales before him, Anaxagoras was born in what's now Turkey. Anaxagoras was born around 500 BC in a city called Clazomenae, in the Persian Empire. When he was a child, Clazomenae participated in the Ionian Revolt and soon became part of the Athenian Empire. Who was Thales? More [...]

Ancient Greek science – math, astronomy, medicine

By |2018-08-22T14:21:07-07:00July 18th, 2017|Greeks, Science|

Ancient Greek science: Greek doctor letting blood out of a patient because he believes in the four humors When did Greek science get started? By about 600 BC, ancient Greek people were getting richer from trading between Egypt, West Asia, Carthage, and Europe. Now richer families could afford to send their boys to college. More boys got a good education and became scientists. Soon [...]

The sun in Greek astronomy

By |2018-04-23T14:13:14-07:00July 18th, 2017|Greeks, Science|

The sun at sunset: The sun in Greek astronomy At first the Greeks imagined that the sun was the god Helios, or Apollo, driving his chariot around and around the earth. In the morning he began driving up in the sky, and then in the evening he drove back down again, and that was the sunset. At night the horses rested under [...]

Astronomy in Ancient China

By |2018-05-24T11:54:19-07:00June 7th, 2017|China, Science|

Chinese astronomy: A Chinese star chart possibly dating from the 600s AD, during the T'ang Dynasty The Chinese zodiac Chinese scholars began by thinking of the stars, the sun, and the moon as gods. Like the scientists of Mesopotamia, they thought they could use the movements of the stars to predict the future. [...]