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News and Views
Nature 448, 31-32 (5 July 2007) | doi:10.1038/448031a; Published online 4 July 2007
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Mars: Ancient fingerprints in the clay
David C. Catling1
Abstract
The thermodynamics of ancient clays on Mars seems inconsistent with the idea that a thick atmosphere of carbon dioxide caused a warm, wet era in the planet's early history. What did cause it remains an enigma.
Volcanic rocks dominate the surface of Mars. In the cold, dry conditions that prevail there today, these rocks can persist with little chemical alteration.
- David C. Catling is in the Department of Earth Sciences, University of Bristol, Queen's Road, Bristol BS8 1RJ, UK.
Email: david.catling@bristol.ac.uk
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