Climate change: Hunters, bison and aurochs Cave painting from Lascaux, ca. 15,000 BC Climate change and human evolution Climate change encouraged the evolution of the first humans, who probably evolved [...]
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 [...]
Wild hemp plant - for hemp cloth, oil, or medicine Where does hemp grow wild? Before people ever thought of using it for anything, hemp grew wild all over Central [...]
Polyester fabric: a polyester shirt Who invented polyester fabric? The British scientists John Whinfield and James Dickson first invented polyester cloth in 1941 in England. World War II had made [...]
Sharecroppers and cotton: Cotton pickers in the 1800s AD Slavery and the cotton gin The invention of the cotton gin in 1793 AD made it possible for enslaved people to [...]
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 [...]
A model of a methane molecule - the simplest of hydrocarbons A kind of molecule Hydrocarbons are molecules. They are made out of hydrogen atoms and carbon atoms. Methane is [...]
What is heat? A big campfire throws some serious heat Definition of heat When molecules of any kind of atoms get more energy in them than they had before, they [...]
Important to Uighur history: Yakub Beg Uighurs become independent After the collapse of the Mongol Empire about 1600 AD, the Uighurs regained their independence. Earlier Uighurs Who were the Mongols? [...]
Oil and water You can easily see for yourself how the amino acids formed into little spheres or bubbles. They were trying to get as far away from the water as [...]
