There is only very small amounts of water in a gas form in the atmosphere and there has been found that there is water in the ice caps on Mars. There is no liquid water on Mars. But ancient Mars is believed to have as much water as Earth does today, in liquid form.
then, it would rain Marshan urine.
mars has a lot of rocks and there are no living things on mars no even today even scientists never found any people living inside mars they only found out that mars has no air and no water
Currently, there are none. But Mars at one time had an atmosphere (or rather, much more of an atmosphere than it does now) and Mars also had water - seemingly a lot of water. The #1 question astronomers have about Mars today is: Did Mars at one time have life?
Earth definitely does. Possibly Venus and Mars have (or have had) a rock cycle of some sort, too. However, Venus and Mars lack liquid water and tectonic plates, which are important in Earth's rock cycle. On Earth, the rock types involved in the cycle are igneous (of volcanic origin), sedimentary and metamorphic.
The water cycle
It was invented by astronomers to help find a chemical in rocks to see is water existed on mars. the date isn't exact, but around 1960-1980.
No one knows for sure, but scientists think since mars doesn't have much of an atmosphere, so the suns rays were directly going into the planet, so that soaked up the water. But the water cycle doesn't work the same way as it does on mars than earth, so it didn't ever rain water, just methane and other gases.
How much water does Mars have?
Some tresses of water on mars .So we can say that there is water on mars
rain started as soon as water came to earth,because there is water there is the water cycle, evaporation,condensation and precipitation.In fact the water we all have today is the same water millions and billions of years ago because of the water cycle.