Answer: 50%
The Black Death, caused by the bacterium Yersinia pestis, wiped out 30 to 50 percent of Europe's population between 1347 and 1351.
Great Britain’s coal resources come from sediments from the Carboniferous age – 300 million years ago-, which rotted under anoxic conditions of sands, silts and mudstones and extend under the North Sea and onshore lands of Northumberland, Durham, North and South Wales, Yorshire, East and West Midlands, Kent, Lancashire and the Scottish Centrl Belt. It took more than ten thousand years to the peat for reaching a thickness of ten metres, enough to make about one metre of coal under the increasing pressure of sediments. Mostly, minig settls in the 1700s were carved, structured with tree trunks and branches and covered with bricks unto 150 foot depth. People always worked there in terrible conditions, including women and children.
Time lines help us to see what years gone by and stuff
One technology was agricultural in the fertile Nile Valley of flooding then planting and harvesting the fields in a cyclical manner though some of the flooding may have been natural. Also, the Egyptians invented paper or papyrus which gave them a medium for writing and recording data. Also, they used the wheel and the lever and the ramp. Of course the wheel was very important for their transportation ie with chariots for example. The ramps were used for building such as the pyramids.
