ESA’s Venus Express may have helped to explain the puzzling lack of water on Venus. The planet has a surprisingly strong electric field – the first time this has been measured at any planet – that is sufficient to deplete its upper atmosphere of oxygen, one of the components of water.
via ESA Space Science
http://www.esa.int/Our_Activities/Space_Science/Venus_Express/Venus_has_potential_but_not_for_water
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