The earth in Greek astronomy
The earth in Greek astronomy: The Greeks never saw this view of the earth from space! Gaia and the Earth Early Greeks thought of the Earth as the goddess Gaia, the mother of [...]
16
07, 2017
16
07, 2017
What is an astrolabe? Greek science
An Islamic astrolabe (832 AD) Who invented the astrolabe? About 140 BC, the Greek astronomer Hipparchus of Rhodes invented the science of trigonometry. What's trigonometry? Greek astronomy History of astronomy All our [...]
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07, 2017
How to make an oil lamp
A homemade oil lamp You can make your own oil lamp at home very easily. Buy any ordinary mushroom for eating. Break off the mushroom's stem and let it dry [...]
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06, 2017
Early European inventions
Earliest science in Europe A Neanderthal stone awl - early European inventions For a long time, northern Europe was a scientific backwater: new ideas came from other places to northern [...]
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06, 2017
What is obsidian? Stone tools
Obsidian spear point, one of many obsidian tools from New Mexico (National Park Service) Where does obsidian come from? Obsidian is a kind of volcanic glass. It is shiny and [...]
20
06, 2017
Global warming in modern times
Coal plant in China: causing global warming When did global warming start? Human activities probably started to affect the world's climate as early as about 10,000 BC. That's when people [...]
20
06, 2017
What is charcoal? History of Science
Charcoal history Why use charcoal? Charcoal is a certain kind of half-burnt wood. People use charcoal for fires because it burns hotter and cleaner than wood (less smoky), and more [...]
19
06, 2017
What is schistosomiasis? Ancient Egypt
Fishing in the swamps on the edges of the Nile River from the tomb of the astronomer Nakht Sixth Dynasty (New Kingdom, ca. 1400 BC) Because pretty much all the [...]
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06, 2017
Ancient Egyptian science – Pyramids and papyrus
Ancient Egyptian science: Nilometer on Elephantine Island (Nile Valley Tours) Scientists in ancient Egypt Egypt was the richest part of Africa. So Egyptians could afford to educate a lot of [...]
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06, 2017
Ptolemies and Cleopatra – Greek Egypt
Ptolemy I Soter, on a coin (He's trying to look like Alexander) Alexander conquers Egypt In 332 BC Alexander the Great and his Greek army conquered Egypt from the Persians who [...]
