It appears that beneath the surface of mars, there are large reservoirs, according to scientists.
Evidence suggests there are large lakes of liquid water beneath the red planet's surface, according to a new study.
There could be enough water in underground reservoirs to create oceans on the surface of Mars, researchers suggest.
Using data from NASA's InSight mission, scientists estimated that the amount of groundwater could cover the entire Mars at a depth of one to two kilometers, or about a mile.
But experts say the reservoir is unlikely to be very useful for anyone trying to use it to supply a future colony of humans on Mars.
It is located in cracks and small pores in rock in the middle of the Martian crust, between 11.5 and 20 kilometres below the surface. Even on Earth, drilling a hole a kilometre deep is a challenge.
Vashan Wright, a former postdoctoral student at UC Berkeley, in the US, who is now an assistant professor at the Scripps Institute of Oceanography at UC San Diego, said: "Understanding the Martian water cycle is critical to understanding the evolution of climate, surface and interior. A useful starting point is to identify where the water is and how much there is."
Scientists on Earth have sent multiple probes to Mars to find out what happened to the water that was on the planet about three billion years ago, how and when it happened and whether life existed or existed on the planet.
Experts suggest the findings are an indication that much of the water has not escaped into space, but has filtered into the crust.