[TheRealVille]

Really? The science I learned in college suggested there is nothing left of the original organisim which has been fossilized, everything that was has been replaced with rock. Actual bones and material that once made up the animal can be tested. This was the view when I took college anthropology.

The carbon 12 remains there forever, it doesn't decay. The ratio of that, compared to other isotopes that decay, knowing their half life, that are found in the fossils is how they date. The ratios are there for you to read.