Itruly enjoyhistory and I was reading about ancient Egypt. It was really and advanced civilization and one of the first to recognize the importance of waste (sewage) removal and water supply in large cities. As a matter of fact, they thought this was so important that the Egyptian rulers offered fully paid scholarships to the university for students wishing to enter this field.They were called Pharaoh Faucet Majors.
Sorry, it's a slow day!