What is plate tectonics? Earthquakes and volcanoes
Plate tectonics: The world as seen from space (flattened out) The continents move around When you look at a map of the world, it seems as though it was always [...]
21
09, 2017
4
08, 2017
European economy in the 1700s
Kids in a spinning mill in England During the 1700s AD, the first modern factories opened. At first these were spinning factories to make thread for clothing, blankets, and sheets. Because most adults [...]
22
06, 2017
Where do oranges and lemons come from?
Oranges and lemons come from earlier fruits; this is a type of citron called Buddha's Hand Wild ancestors of oranges and lemons The first wild ancestors of oranges and lemons [...]
26
05, 2017
How do Opossums carry their babies? Biology
Opossum The earliest mammals, about 200 million years ago, hatched from eggs and then got milk from their mothers, like the duck-billed platypus. But soon after that, about 125 million [...]
