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Dating techniques in archaeology and paleoanthropology

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History, anthropology, and archaeology are three distinct but closely related bodies of knowledge that tell man of his present by virtue of his past.

Historians can tell what cultures thrived in different regions and when they disintegrated.

With 18 protons and 22 neutrons, the atom has become Argon-40 (Ar-40), an inert gas.

For every 100 K-40 atoms that decay, 11 become Ar-40.

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.

Over the years, archaeology has uncovered information about past cultures that would have been left unknown had it not been with the help of such technologies as radiocarbon dating, dendrochronology, archaeomagnetic dating, fluoride dating, luminescence dating, and obsidian hydration analysis, among others.

It is based on the fact that some of the radioactive isotope of Potassium, Potassium-40 (K-40) ,decays to the gas Argon as Argon-40 (Ar-40).

But archaeology’s aim to understand mankind is a noble endeavor that goes beyond uncovering buried treasures, gathering information, and dating events.based on the fact that amino acids progressively change to mirror image forms following the death of an organism--i.e., from L-amino acid to D-amino acid forms.Aspartic acid in organic samples is commonly used for this dating technique.things that are intentionally made according to a cultural pattern or inadvertently modified as a result of culturally patterned behavior.Potassium (K) is one of the most abundant elements in the Earth's crust (2.4% by mass).One out of every 10,000 Potassium atoms is radioactive Potassium-40 (K-40).The advantage of this technique over the conventional radiocarbon method is that it requires a far smaller sample size and can potentially provide dates going back to around 100,000 B. At present, however, AMS dates generally are for events less than organic molecules that are building blocks of proteins.