About the cover

November 2016 Volume 9 No 11

The late Palaeozoic was marked by a series of glacial–interglacial cycles. Geochemical and fossil data suggest a role for terrestrial vegetation–carbon cycle feedbacks in the climate response to orbital forcing. The image shows a modern tree fern, Cyathea australis, which was grown in simulated Carboniferous glacial atmospheres of 400 ppm CO2 and 24% O2. The image was produced as a silver-print, photogenic drawing re-enacting old 18th century photographic processes.

Letter p824; News & Views p803

IMAGE: © SIOBHAN MCDONALD;

REPHOTOGRAPHED DIGITALLY BY VINCENT HOBAN

COVER DESIGN: TULSI VORALIA

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