Screw – Simple machines – Physics
A cider press with big wooden screws What is a screw? People always count screws as a separate kind of simple machine. But really screws are just one kind of inclined plane. [...]
17
08, 2017
1
07, 2017
What’s the Ionic order?
Ionic order: the parts of an Ionic temple A new way to build temples Around 500 BC, Greek architectural styles changed so that instead of building temples in the old [...]
23
06, 2017
Who invented playing cards? China
An early playing card (Ming Dynasty, ca. 1500 AD) People in T'ang Dynasty China made the first playing cards, about 800 AD. They used their new material, paper, to make [...]
8
06, 2017
History of Knitting
History of knitting: Nalbinding hat from Urumchi (ca. 1000 BC) Nalbinding and sprang Even before the invention of spinning and weaving, people were making cloth using early forms of knitting [...]
6
06, 2017
Chinese animals – Environment of China
A camel caravan in northern China Long ago, in the Stone Age, about 3000 BC, many different kinds of wild animals lived in China - elephants, lions, pandas, wild horses, [...]
25
05, 2017
What is lost wax casting? History of Art
A Samnite man cutting the bronze pins off a newly poured lost wax statue. This is the only ancient image of lost wax casting; it's from Pompeii, about 400 BC. [...]
