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Recall that atoms are the basic building blocks of matter.

Atoms are made up of much smaller particles called protons, neutrons, and electrons.

It has become my custom here at Interesting Thing of the Day to choose topics that I think will be unfamiliar to most readers—a sort of implicit “I’ll-bet-you’ve-never-heard-of-this” test.

I think it’s fair to say that any educated person over the age of 10 or so has probably heard of carbon dating.

Ever wonder how scientists concluded the age of the earth to be about 4.6 billion years old or how geologists determined the ages of caverns, rocks, volcanoes and the Himalayas? Well, scientists are able to answer all of these wondrous questions and more by use of a process called radiometric or radioactive dating.

Radioactive dating enables geologists to record the history of the earth and its events, such as the dinosaur era, within what they call the geologic time scale.

High in the atmosphere, cosmic rays strike nitrogen atoms, producing a radioactive carbon isotope known as carbon-14 (or .

Many people have been led to believe that radiometric dating methods have proved the earth to be billions of years old.MYTH #2 Radiocarbon dating has established the date of some organic materials (e.g., some peat deposits) to be well in excess of 50,000 years, thus rendering a recent creation (6 to 10 thousand years ago) impossible.Some organic materials do give radiocarbon ages in excess of 50,000 "radiocarbon years." However, it is important to distinguish between "radiocarbon years" and calendar years.Radioactive dating uses the ratios of isotopes and their specific decay products to determine the ages of rocks, fossils and other substances.Elements occur naturally in the earth, and they can tell us a lot about our Earth's past.

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