The water that was once believed to be on Mars is made up of the same molecular structure that the water on Earth is made up of (H2O). An infrared map of Mars shows that the Northern Ice Caps are drenched in Deuterium, which can be used to our advantage when determining how much water was on Mars. The more Deuterium, the more water. Mars had so much water, that the amount would be 6 times the volume of the Ice caps. The water covered a depth of 137 m, or 0.137 km. Geronimo Villanueva, the main author of studies like this stated, “Ultimately we can conclude this idea of an ocean covering 20% of the planet which opens the idea habitability and the evolution of life on another planet.” A statement like that has opened up many doors in extraterrestrial life on other planets.
In conclusion, this is a major discovery that is extremely important for us as we may not be the only ones ever anymore. So some may look at this as just a puddle of possible water on another planet that we can not get to, and others look at it as a new beginning of a long journey, which way do you look at it?