How is half-life used to indicate a date of a fossil?

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June 10, 2010 4:55AM

I believe that the half-life refers to the amount of carbon in it. By knowing the half-life of carbon it can be used to say how old something is. Ofcourse plus or minus a few years. This is where carbon dating comes from. Hope this helps.

EDIT: the half-life refers to the time it takes for an element to decay into its daughter element