The findings reported in the journal Nature Geoscience, indicate water vapour in the Martian atmosphere could form overnight frosts on the ground, which are turned liquid by salts in the Martian soil.
"We have discovered the substance calcium perchlorate in the soil and, under the right conditions, it absorbs water vapour from the atmosphere," says the study's lead author associate professor Morten Bo Madsen of theNiels Bohr Institute at the University of Copenhagen .... http://www.abc.net
