article_snippet.sent: The explanation is that the substance perchlorate has been found in the soil, which lowers the freezing point so the water does not freeze into ice, but is liquid and present in very salty water.
article_snippet.sent: When night falls, some of the water vapour in the atmosphere condenses on the planet surface as frost, but calcium perchlorate is very absorbent and calcium perchlorate forms a brine with the water, so the freezing point is lowered and frost can turn into a liquid.
article_snippet.sent: When night falls, some of the water vapour in the atmosphere condenses on the planet surface as frost, but calcium perchlorate is very absorbent and calcium perchlorate forms a brine with the water, so the freezing point is lowered and frost can turn into a liquid.
article_snippet.sent: The soil is porous, so what we are seeing is that the water seeps down through The soil. '
article_snippet.sent: Over time, other salts may also dissolve in The soil and now that other salts are liquid, other salts can move and precipitate elsewhere under the surface.'
highlights_snippet.sent: Substance perchlorate has been found in the soil, which lowers the freezing point so the water does not freeze into ice, but is liquid .
  