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Throughout history, people have devised systems to make getting water into their communities and households and disposing of (and later also treating) wastewater more convenient. [1] The historical focus of sewage treatment was on the conveyance of raw sewage to a natural body of water, e.g. a river or ocean, where it would be diluted and ...
An analysis of Ancient American Engineering works shows that the engineers adhered strictly to two important principles: the efficient use of the resources available and the effectiveness of a project design. Of the resources available then, the tools were quite rudimentary: none of iron, some of copper and other metals, but mostly of wood and ...
The Navajo and Hopi people have long embraced the water underneath and around the Black Mesa area as sacred to their people. The people have long lived around and became dependent on springs and wells of the Black Mesa. These waters are the only source of drinking water, water for livestock, and water for agriculture for the Navajo and Hopi people.
The history of such philosophical theories that relate to chemistry can probably be traced back to every single ancient civilization. The common aspect in all these theories was the attempt to identify a small number of primary classical elements that make up all the various substances in nature.
The archaeology of the Americas is the study of the archaeology of the Western Hemisphere, including North America (Mesoamerica), Central America, South America and the Caribbean. This includes the study of pre-historic/ Pre-Columbian and historic indigenous American peoples , as well as historical archaeology of more recent eras, including the ...
Chemical clues in zircon crystals suggest the rock in which they formed came into contact with fresh water 4 billion years ago, when Earth was thought to be covered in ocean.
Maritime trade goods of the Maya. The extensive trade networks of the Ancient Maya contributed largely to the success of their civilization spanning three millennia. Maya royal control and the wide distribution of foreign and domestic commodities for both population sustenance and social affluence are hallmarks of the Maya visible throughout much of the iconography found in the archaeological ...
"Earth and water" (Greek: γῆ καί ὕδωρ; Persian: آب و زمین) is a phrase that represents the demand by the Achaemenid Empire for formal tribute from surrendered cities and nations. It appears in the writings of the Greek historian and geographer Herodotus , particularly with regard to the Greco-Persian Wars .