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It is too soon to know whether the discovery will seriously upset the estimated dates of events like the arrival of human beings in the Western Hemisphere, scientists said.But it is already clear that the carbon method of dating will have to be recalibrated and corrected in some cases.Though still heavily used, relative dating is now augmented by several modern dating techniques.Radiocarbon dating involves determining the age of an ancient fossil or specimen by measuring its carbon-14 content.) is only 5,730 years—that is, every 5,730 years, half of it decays away.After two half lives, a quarter is left; after three half lives, only an eighth; after 10 half lives, less than a thousandth is left.Diamond is the hardest substance known, so its interior should be very resistant to contamination.Diamond requires very high pressure to form—pressure found naturally on earth only deep below the surface.

- At Oak Ridge National Laboratory, Scientists dated dinosaur bones using the Carbon dating method.

Many people are under the false impression that carbon dating proves that dinosaurs and other extinct animals lived millions of years ago.

What many do not realize is that carbon dating is not used to date dinosaurs. Carbon dating is only accurate back a few thousand years.

Since 1947, scientists have reckoned the ages of many old objects by measuring the amounts of radioactive carbon they contain.

New research shows, however, that some estimates based on carbon may have erred by thousands of years.

Scientists at the Lamont-Doherty Geological Laboratory of Columbia University at Palisades, N.

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