Lucas' clones are created by strange-looking aliens on a fantastic, stormy water planet.
"The results suggest that water was incorporated during the formation of Mars and that the planet was able to store water in its interior during the planet's differentiation, " Hauri said.
MSN: Scientists say parts of Mars interior are as wet as Earth's
He has a point: Polluted water is the planet's deadliest foe, killing 14, 000 people a day, according to the World Health Organization.
We roped up at the Standhardt Col, a pass overlooking the Southern Patagonia Ice Field, one of the largest expanses of frozen water on the planet.
Nasa's Curiosity rover has only been on the surface of Mars seven weeks but it has already turned up evidence of past flowing water on the planet.
Furthermore, it is all the more urgent to take action in this domain because 50% of the biodiversity and fresh water of the planet is concentrated in this region of the world.
If a large body of water once existed on the red planet, the remainder of the water must now either be stored below the surface and in the much smaller south polar cap, or have been lost to space.
This has enabled scientists to estimate the volume of water in the ice cap and speculate that much of the planet's original water is either hidden below the surface or missing.
However there has long been a quest for "smoking gun" evidence for liquid water currently on the planet.
The potentially massive capital expenditures needed to update and maintain the world's water infrastructures are likely to encourage cash-strapped municipalities all over the planet to privatize and consolidate their water services.
From source to sea and through the never ending water cycle, water connects all corners of planet Earth.
The reason why that's exciting, is one of the properties we'd like to have on a habitable planet is liquid water on the surface.
"We believe there is water still embedded in the planet and maybe some creatures which might be at a certain level of life, " Fournier-Sicre said.
It's often said that we know more about the surface of the Moon or even of Mars than we do about the two-thirds of our planet covered by water.
"We have found a habitable environment which is so benign and supportive of life that if you had been on the planet, the water would have been pure enough to drink, " said planetary scientist John Grotzinger, at the California Institute of Technology, who is the mission's project scientist.
For instance, Mawrth Vallis, one of the largest identified clay-rich regions on the Red Planet, exhibits a more uniform mineralogy pattern that indicates water was much more closely tied to surface processes on the planet.
MSN: New proof that water existed underground on ancient Mars
It is a pipe-eating, planet-cooking, water-fouling goo that nobody knows how to get out of our water.
The country has 21% of the world's population within its borders, but only 7% of the planet's renewable water resources.
If the planet does harbor liquid water today, it would have to be deep below the surface, perhaps peeking out in a few special places, but not likely to be seen by Curiosity, Squyres said.
They said water seemed to have flowed down two gullies in the past few years, even though liquid water cannot remain long on the planet's frigid, nearly airless surface because it would rapidly freeze or evaporate.
The finding upends previous studies, which had estimated that the Red Planet's internal water stores were scanty at best something of a surprise, given that liquid water apparently flowed on the Martian surface long ago.
MSN: Scientists say parts of Mars interior are as wet as Earth's
The habitable zone is the region of a planetary system which is neither too hot nor too cold - such that water on the surface of a planet will neither evaporate nor freeze, but instead can stay liquid.
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Clean, silent, (well, OK, a high-pitched whistling sound), uses no fuel whatsoever, except hydrogen, the most plentiful element on the planet, and emits only water vapor.
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At the most basic level, each human body on the planet contains more than 60% water.
At that point, the Earth's atmosphere and water will be boiled away, leaving the planet uninhabitable.
One in six people on the planet do not have access to clean water.
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Seasonal fogs on the red planet would moisten the rocks with enough water to supply resident organisms.
There will soon be too many people on this planet for everyone to consume as much water as they do today.
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But both discovered suggestive evidence that water might have once flowed on the surface of the planet.
The race is now on to detect whether the planet has an atmosphere and whether it contains water.
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