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Early human habitations were often built next to water sources. Rivers would often serve as a crude form of natural sewage disposal. Over the millennia, technology has dramatically increased the distances across which water can be relocated. Furthermore, treatment processes to purify drinking water and to treat wastewater have been improved.
Hippocrates believed that water had to be clean and pure. Rainwater was the best water, but had to be boiled and strained before drinking to get rid of the "bad smell" and to avoid hoarseness of the voice. [3] [4] He designed a crude water filter to “purify” the water he used for his patients. Later known as the “Hippocratic sleeve ...
The link between water and disease was still not well established and in 1873 the president of the New York board of health declared that "although rivers are great natural sewers, and receive the drainage of towns and cities the natural process of purification, in most cases destroys the offensive bodies derived from sewer and renders them ...
Most water is purified and disinfected for human consumption (drinking water), but water purification may also be carried out for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications. The history of water purification includes a wide variety of methods.
In early human history, although the energy and other resource demands of nomadic hunter-gatherers were small, the use of fire and desire for specific foods may have altered the natural composition of plant and animal communities. [4] Between 8,000 and 10,000 years ago, agriculture emerged in various regions of the world. [14]
Modern humans, 200,000 to 300,000 years ago, were really adaptable, spanning from the Arctic tundra to the Sahara desert. Other things are still unknown about Homo erectus, like if they had a ...
The Stone Age is a broad prehistoric period during which stone was widely used in the manufacture of implements with a sharp edge, a point, or a percussion surface. The period lasted roughly 2.5 million years, from the time of early hominids to Homo sapiens in the later Pleistocene era, and largely ended between 6000 and 2000 BCE with the advent of metalworking.
Virtually absent from most present-day Western diets, seaweed and aquatic plants were once a staple food for ancient Europeans, an analysis of molecules preserved in fossilized dental plaque has ...