Advantages of radiocarbon dating

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A child mummy is found high in the Andes and the archaeologist says the child lived more than 2,000 years ago.

How do scientists know how old an object or human remains are?

Radiocarbon dating or in general radioisotopic dating method is used for estimating the age of old archaeological samples. In the upper atmosphere, nitrogen (C in a living plant, were can estimate the age of the object (the age of the object means the number of years ago when plant should have died), by using the formula.

For example, age of the earth, moon, rocks, and mineral deposits can be determined by using the principle of radioisotopic dating. Age of the carbon containing object = t C in it, is called radiocarbon dating.

Other useful radioisotopes for radioactive dating include Uranium -235 (half-life = 704 million years), Uranium -238 (half-life = 4.5 billion years), Thorium-232 (half-life = 14 billion years) and Rubidium-87 (half-life = 49 billion years).

The resulting radiocarbon combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire in a sample from a dead plant or animal such as a piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died.Many early historians were influenced by supernatural folktales in their explanations.Some legends held that Merlin had a giant build the structure for him or that he had magically transported it from Mount Killaraus in Ireland, while others held the Devil responsible.Carbon-14 dating is a way of determining the age of certain archeological artifacts of a biological origin up to about 50,000 years old.

It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.

The first academic effort to survey and understand the monument was made around 1640 by John Aubrey. This view was greatly popularised by William Stukeley.

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