It definitely does - but a very small amount. A far more interesting discovery is that the soil is relatively 'wet' - about 2% water by weight. [1] That's one o

It definitely does - but a very small amount. A far more interesting discovery is that the soil is relatively 'wet' - about 2% water by weight. [1] That's one of the very few things "The Martian" got accidentally wrong. Getting water on Mars is going to be super easy. That's a liter (2 pints) of water that can be extracted per cubic foot (0.03 cubic meters) of soil, even if you're not near water ice or anything else of the like. And that's, out of necessity, a result of studying surface level soil on Mars. It's suggestive that below the surface the soil could be even more moist. [1] - https://www.space.com/22949-mars-water-discovery-curiosity-rover.html https://www.space.com/22949-mars-water-discovery-curiosity-r...