A stone pottery wheel discovered in the city-state of Ur dates to around 3429 BCE, and even older fragments of wheel-thrown pottery have been found in the same space. Fast potters’ wheels enabled early mass production of pottery, nevertheless it was the usage of the wheel as a transformer of vitality that revolutionized the application of nonhuman energy sources. The first two-wheeled carts were derived from travois and were first utilized in Mesopotamia and Iran in round 3000 BCE.
Khan Academy – The Khan Academy is a not-for-profit organization offering digital learning assets, including an intensive video library, practice exercises, and assessments. These resources focus on K-12 math and science matters such as biology, chemistry, and physics, and embody sources on the humanities, finance, and historical past. Leadership Public Schools – In each of the four LPS schools, lecturers work together to utilize open-source materials to meet the specific learning …