History of Chinese Medicine
Chinese medicine: a Chinese village doctor treating a man by burning herbs on his back (Song Dynasty, ca. 950 AD., now in National Palace Museum, Taiwan) What's the earliest Chinese [...]
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06, 2017
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06, 2017
Math and Numbers in Ancient China
Chinese numbers: number rods Chinese numbers People in China were using written numbers by about 1500 BC, in the Shang Dynasty. This is about two thousand years later than people began [...]
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06, 2017
What is a camera obscura? – Chinese 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 [...]
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06, 2017
Astronomy in Ancient China
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 [...]
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06, 2017
What are the Nine Chapters? Math in Ancient China
Nine Chapters: How to figure out the area of an isosceles triangle. A math textbook from Han Dynasty China The earliest Chinese mathematical textbook is called the Nine Chapters. It [...]
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06, 2017
Chinese Science History – Ming and Qing Dynasties
During the Ming Dynasty, not many scientists were working in China; most people who wanted to do science moved west to the big universities of Central Asia. But when Jesuit missionaries from [...]
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06, 2017
What is plastic? Organic chemistry
Plastic water bottles There are thousands of different kinds of plastic, from shopping bags to Fisher-Price toys to photographic film, CD's, and plumbing pipes. Some plastics, like chewing gum or [...]
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06, 2017
What is a protein? Organic chemistry
Proteins are a type of molecule made mainly out of hydrogen and carbon atoms. They are combinations of smaller molecules called amino acids. The first amino acids probably developed into proteins more than four [...]
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06, 2017
What is uranium? Atoms, elements, chemistry
Diagram of a uranium atom Uranium is a rare atom, not just on Earth but also in space and on other planets. There is not very much uranium anywhere. That's [...]
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06, 2017
What is tin? Atoms, elements, chemistry
Like the other metals, tin is one of the heavier kinds of atoms. Every atom of tin has 50 protons and 69 neutrons in its nucleus (depending on the isotope; the exact [...]
