‘We thought it was impossible:’ Water frost on Mars discovered near the Red Planet’s equator

Water frost has been observed on Mars' equator for the first time. In this region of the Red Planet, similar to the tropics, it was previously thought impossible for frost to exist.

The discovery could be crucial for modeling where water exists on Mars and how it is exchanged between the Red Planet's atmosphere and its surface. This could be crucial for future human explorations of Mars.

The water frost was observed by two European Space Agency (ESA) spacecraft, first by the ExoMars Trace Gas Orbiter (TGO), which arrived at Mars in 2016, and then by the Mars Express mission, ...