camera obscura

Home » camera obscura

The human body in medieval and modern science

By |2018-04-25T17:09:55+00:00September 6th, 2017|Biology, Science|

Chinese drawing of the organs (about 1200) Between the Middle Ages and modern times, doctors have learned a lot of new things about how human bodies work. The Islamic doctor Al-Tabari, in the early 800s, learned that light bounces off objects into your eyes. Al-Tabari's student Al Razi figured out that a fever is your body's way of fighting illness, not [...]

Medieval astronomy in Europe

By |2018-04-24T08:21:21+00:00August 4th, 2017|Medieval, Science|

Astrolabe in Hebrew, probably from Spain (1300s AD) In the early Middle Ages, most people in Europe were too poor to have much time for astronomy. But some people were still interested in the stars. Astrologers tried to predict the future. Monks wanted to figure out the right day to celebrate Easter, or the right times for prayers. And a few [...]

Who was Euclid? History of Geometry

By |2018-04-23T14:03:16+00:00July 18th, 2017|Africa, Egypt, Science|

An Egyptian papyrus from about 100 AD which is a piece of one of Euclid's books Nobody knows much about Euclid's life anymore - it is all forgotten. We only know that he worked at the University of Alexandria, in Egypt, for a while. There are no pictures of him. We can't even be sure [...]

Who was Aristotle? – Greek philosophy – Ancient Greece

By |2018-05-11T14:11:12+00:00July 12th, 2017|Greeks, Philosophy|

Who was Aristotle? An ancient Egyptian papyrus with a scrap of Aristotle's "Politics" Aristotle's family Aristotle's father was Nicomachus, a doctor who lived near Macedon, in the north of Greece. (More about ancient Greek doctors) His mother Phaestis was from Euboea. She probably worked from home. So, unlike Socrates and Plato, Aristotle was [...]

What is a camera obscura? – Chinese Science

By |2018-05-28T22:31:08+00:00June 7th, 2017|China, Science|

What is a camera obscura? This is a large camera obscura: a dark room with an image projected into it. Who invented the camera obscura? The Chinese philosopher and scientist Mozi may have been the first person to write about a camera obscura, about 400 BC - anyway, Mozi's camera is the first [...]