Megacities
Cities have been around for thousands of years; the first ones appeared in about 3,000 BC....
Money may not grow on trees, but chocolate does. The cacao tree is found in tropical climates and produces fruit the size of footballs. The seeds inside the fruit are commonly called cocoa beans. To make chocolate, cocoa beans are sun-dried and then roasted. The shells are then removed and the meat of the beans is ground. Because cocoa beans have a high amount of fat, when roasted beans are ground, a thick liquid is formed. This liquid is referred to as chocolate liquor. At this point, the chocolate is very bitter. To form inviting chocolate bars, additional ingredients are added to the liquid as it cools and hardens. Common additions include sugar and vanilla. Adding milk, as well, creates the very popular milk chocolate bar.
Cities have been around for thousands of years; the first ones appeared in about 3,000 BC....
Soybeans are one of the oldest cultivated crops in the world. The plant is native to easte...
The earth's surface is composed of big slabs of rock called plates. Volcanoes are form...