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Among other things, it handles the nutrients that have been absorbed by the gut from food, removes toxins from the blood, makes proteins like albumin and clotting factors (these help in the clotting process), and secretes bile which helps digest fatty foods in particular.

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Radiocarbon dating is one of the great tools of science that has allowed archeologists to shed new light on everything from the building of Stonehenge to the beginnings of international trade.However, a new study from the Imperial College London suggests that fossil fuel carbon emissions may be so diluting radioactive carbon isotopes that within decades it will difficult to differentiate between modern artifacts and those over a thousand years old.Anthropologists can describe a people’s physical character, culture, and environmental and social relations.Archaeologists, on the other hand, provide proof of authenticity of a certain artifact or debunk historical or anthropological findings.We stick the garden hose in and turn it on full blast.The water coming out of the hose is analogous to the continuous production of carbon-14 atoms in the upper atmosphere.We know that it is older than Christendom, but whether by a couple of years or a couple of centuries, or even by more than a millenium, we can do no more than guess." [Rasmus Nyerup, (Danish antiquarian), 1802 (in Trigger, 19)].The person who wrote these words lived in the 1800s, many years before archaeologists could accurately date materials from archaeological sites using scientific methods.

The aim here is to provide clear, understandable information relating to radiocarbon dating for the benefit of K12 students, as well as lay people who are not requiring detailed information about the method of radiocarbon dating itself.It's based on the very simple principle that radioactive isotopes decay at a steady, predictable rate.Radium, for example, has a half-life of about 1,600 years.Archaeology has undoubtedly enriched mankind’s history like no other science.There is a greater part of man’s unwritten past that archaeology has managed to unravel.It is in knowing what made past cultures cease to exist that could provide the key in making sure that history does not repeat itself.