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Equilibrium is the name given to the point when the rate of carbon production and carbon decay are equal.By measuring the rate of production and of decay (both eminently quantifiable), scientists were able to estimate that carbon in the atmosphere would go from zero to equilibrium in 30,000 – 50,000 years.Since the universe is estimated to be millions of years old, it was assumed that this equilibrium had already been reached.However, in the 1960s, the growth rate was found to be significantly higher than the decay rate; almost a third in fact.Y., reported today in the British journal Nature that some estimates of age based on carbon analyses were wrong by as much as 3,500 years.

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It is very difficult for scientists to know how much carbon would have originally been present; one of the ways in which they have tried to overcome this difficulty was through using carbon equilibrium.

At least to the uninitiated, carbon dating is generally assumed to be a sure-fire way to predict the age of any organism that once lived on our planet.

Without understanding the mechanics of it, we put our blind faith in the words of scientists, who assure us that carbon dating is a reliable method of determining the ages of almost everything around us.

It has been summed up most succinctly in the words of American neuroscience Professor Bruce Brew: that samples of moss could be brought back to life after being frozen in ice. That carbon dating deemed the moss to have been frozen for over 1,500 years.

Now, if this carbon dating agrees with other evolutionary methods of determining age, the team could have a real discovery on their hands.