Dating Fossils Wiki

dating fossils wiki




How can we be sure of the age of extremely old fossils? Radiocarbon dating is only accurate to 60,000 years?

I asked in this question how scientists knew that Amoebas evolved 2 billion years after the earliest life forms:

Well, we are never sure. We just have the best conclusion we can draw from the evidence.

There are other forms of dating that work well beyond the age at which C-14 dating no longer works.

Below is a really good article about radiometeric dating.

I think that some of the evidence about fossil evolution comes from molecular clock data: that is, we use fossils and DNA to tell us how long it takes to accumulate a certain number of DNA changes, and then we figure out how many relavent changes there are between amoebas and other organisms, and we extrapolate how long ago the last common ancestor was.

Evolution and the age of Earth

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