Detecting traces of water on Mars

When trapped in a Mars sand, Spirit self-propelled vehicles have suddenly discovered evidence that each has a sub-surface water of the planet in the past.

Spirit self-propelled car on Mars. (Internet photo)

" This is purely just luck, " Space.com quoted Washington University scientist Ray Arvidson . While trying to move through the sand, Spirit self-propelled cars crushed the special surface soil rich in silica (SiO2 chemical formula). After failing in every Spirit shift effort, scientists on Earth have no choice but to study the soil beneath the body. They happened to find compounds that can dissolve among insoluble minerals like silica, hematite and gypsum.

The presence of these compounds indicates that water has melted ferric sulfate in the past. Arvidson expert speculated that about a hundred thousand years ago, snow had fallen into the standing Spirit area and then melted, crept through the sand to seep into the ground. As for the fate of the Spirit self-propelled vehicle, while being tied to the sand, this car has no longer collected enough light to charge the battery and permanently ends its life in Mars.