Scientists report the discovery of water frost on Martian volcanoes' summits and equatorial regions, hinting at past Martian climatic conditions potentially millions of years ago.
In the colder months, a thin layer of frost, thinner than a human hair, forms on the volcano calderas and evaporates shortly after sunrise, indicating a daily condensation of 150,000 tonnes of water.
Martian landscapes show traces of a once wetter state with lakes and rivers, suggesting potential habitability. The frost on volcanoes offers insights into past climate processes on Mars.
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