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Published online 31 August 2008 | Nature | doi:10.1038/news.2008.1071

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Plants reveal ozone's history

Spores may fill gap in atmospheric records.

A gaping hole in atmospheric scientists' records could soon be filled thanks to the spores of a primitive moss.

Led by Barry Lomax, at the University of Nottingham, UK, a team of researchers has devised a way to reconstruct past levels of ozone by measuring levels of the chemicals that act as protective 'sunscreens' in the spores.

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