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However, once the organism dies, the amount of carbon-14 steadily decreases.

By measuring the amount of carbon-14 left in the organism, it's possible to work out how old it is.

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.

This period of courtship is sometimes seen as a precursor to engagement or marriage.With the use of modern technology, people can date via telephone or computer or meet in person.This term may also refer to two or more people who have already decided they share romantic or sexual feelings toward each other.The protocols and practices of dating, and the terms used to describe it, vary considerably from country to country and over time.While the term has several meanings, the most frequent usage refers to two or more people exploring whether they are romantically or sexually compatible by participating in dates with the other.Dating as an institution is a relatively recent phenomenon which has mainly emerged in the last few centuries.