Rene Descartes was a key figure in the scientific revolution and had some stuff to do with math so probably him ( don't hold me to that and check other peoples answers)
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the British and the french
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Akhenaten was an Egyptian pharaoh who ruled during the Eighteenth Dynasty of the New Kingdom period of Ancient Egypt. He is famous for changing the traditional religion of Egypt from the worship of many gods to the worship of a single god named Aten.
The Colorado River was like otherwise rivers but due to overuse for it's water to humans and agriculture and also with the poor manegnent of the river, The rivers has become an environmental problems, Threatening species around the river that Daily depended on the vezitation and fresh water it got from the river. The river is expected to have it's water flow cut completely soon so that will also mean the shut down of hydroelictric dams.
I hope I was a help.