Ancient diseases and doctors – History of medicine
Greek doctor letting blood out of a patient because he believes in the four humors: history of medicine How did ancient doctors treat diseases? Ancient doctors tried to cure everyone who [...]
Greek doctor letting blood out of a patient because he believes in the four humors: history of medicine How did ancient doctors treat diseases? Ancient doctors tried to cure everyone who [...]
Dengue history: the dengue virus - magnified many times Dengue history Probably dengue fever didn't exist before the late 1700s AD, so in the ancient and medieval worlds there was no [...]
History of cholera: Washing clothes in the river (India) Where did cholera get started? Cholera (KOLL-uh-rah) is a very serious sickness. It probably first got started in India. History of disease [...]
An eclipse of the moon. You can see the curved shadow of the Earth. Logic tells you the earth is round. Making predictions Once people have seen that something happens [...]
History of lead: A Roman anchor from Palermo, Italy What did ancient people use lead for? Lead is a kind of metal that is very heavy. (See if you can get some lead, [...]
Phoenician ship A knot is a way to measure how fast a ship is travelling on the ocean or how fast a boat is going on a river. A knot [...]
Chinese star chart possibly dating from the 600s AD, during the T'ang Dynasty Science means "knowing" in Latin. It is the process of learning things about the world. People have always wanted to learn [...]
Medieval glass: Islamic glass (probably Iraq, 800s AD, now in the Metropolitan Museum, New York) Medieval glass-making By the 1100s, glass-making was expanding again from West Asia; there were glassworks further [...]
Obsidian: naturally occurring glass History of glass: Glass beads from Old Kingdom Egypt, about 2700-2500 BC People have been using naturally occurring glass since the Stone Age, when they wanted an [...]
What is flint? Flint is a sedimentary rock made out of an igneous rock. What is flint made of? It's pretty complicated. Billions of years ago, silicon and oxygen atoms [...]