Radioactive dating
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Bernard Nebel.
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How do we determine how long ago the animal, now a fossil, was alive?
The following video provides an explanation of radioactive dating:
https://www.youtube.com/watch?v=phZeE7Att_s
As noted, carbon-14 dating is only good for the the past roughly 60 thousand years.
The following video provides an example of dating a mineral using an isotopes with a much longer half-life: https://www.youtube.com/watch?v=1920gi3swe4
Please post questions.
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