How paleontologists are using fossilized shark teeth to date the past
Sharks have ruled the Earth’s oceans for 400 million years and recent research on fossilized shark teeth has led to the ...
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Fossil shark teeth are abundant and can date the past in a unique way
That data allowed scientists to map out ratios of strontium isotopes in seawater over time. This global strontium seawater curve correlates to the geologic timescale. Scientists use the curve to ...