<http://schema.org/description>
"Water-ice clouds on Mars are the key to the planet's semi-diurnal tides and unusual thermal cycle."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/Blog/2013/06/13/Mars-water-ice-clouds-are-key-to-temperature-pattern/5691371140349/?rel=3701371209184>