The stable C12 and C13, and the unstable or radioactive Carbon 14. Only one C14 atom exists for every one trillion C12 atoms.
In the presentation speech for the 1960 Nobel Prize in Chemistry, one scientist described the work by honoree Willard Libby with these words: “Seldom has a single discovery in chemistry had such an impact on the thinking of so many fields of human endeavour.
Seldom has a single discovery generated such wide public interest.” Libby’s research demonstrated the usefulness of carbon-14 in dating samples thousands of years old.
The concept behind radiocarbon dating is rather simple.
While organisms live, they incorporate radioactive carbon-14 from the atmosphere.
So if scientists believe that a creature lived millions of years ago, then they would need to date it another way. They assume dinosaurs lived millions of years ago (instead of thousands of years ago like the bible says).
They ignore evidence that does not fit their preconceived notion.Though radiocarbon dating clearly enjoys “wide public interest,” it also generates much confusion and discord among Christians, which leads to an obvious question: is Libby’s celebrated work a reliable technique for dating ancient objects?The short answer is a resounding YES and here’s why.The results can be as much as 150 million years different from each other! They then pick the date they like best, based upon their preconceived notion of how old their theory says the fossil should be .So they start with the assumption that dinosaurs lived millions of years ago, then manipulate the results until they agree with their conclusion. So why is it that if the date doesn't fit the theory, they change the facts?The most important archaeological dating method is radiocarbon dating.