Early morning frost spotted on some of Mars’s huge mountains

Thin dusting of water ice appears to form overnight in summit craters and evaporate after sunrise, scientists say

Early morning frost has been spotted on some of the largest mountains in the solar system - the colossal Martian volcanoes that rise up to three times the height of Mount Everest near the planet's equator.

In colder months the fine dusting of ice, thinner than a human hair, appears to form overnight in the volcanoes' summit craters, or calderas, and on sections of their rims and then to evaporate a few hours after sunrise.