Advent of Complex Life

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Home › A Walk Through Geologic Time

How do we tell time?

For more information on Radiometric Dating and the creation of the Geologic Timescale:

Understanding Evolution's overview of the history of radiometric dating
Understanding Evolution's overview of using radiometric dating to tell how old a fossil is
And still more from Understanding Evolution!
A more detailed and complex account of radioactive decay and radiometric dating
The website of International Commission on Stratigraphy, which decides on the official geologic time scale.

‹ Timeline Interactives up

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