Fossil algae reveal 500 million years of climate change

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Scientists have succeeded in developing a new indicator (proxy) of ancient CO2 levels, using the organic molecule phytane, a debris product of chlorophyll. This new organic proxy not only provides the most continuous record of CO2 concentrations ever, it also breaks a record in its time span, covering half a billion years.

from Fossils News -- ScienceDaily https://ift.tt/2SfwjKM

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