It is a pipe-eating, planet-cooking, water-fouling goo that nobody knows how to get out of our water.

CNN: The real, and dirty, Obama scandal

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.

FORBES: Innovation: Water's Life Saver

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.

BBC: A deep sea mission of genuine exploration

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.

BBC: NEWS | Science/Nature | Earth-like planets may be common

Lucas' clones are created by strange-looking aliens on a fantastic, stormy water planet.

FORBES: Scientists Fret Over 'Clones'

Members of the project hope that future habitants on the planet will be able to harness the wind, water deposits and soil to become self-sufficient.

BBC: Destination Mars on Earth

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

So some of the water is being taken out of the system, not by being lost from the planet, but by being sequestered - or hidden away - in these glacial deposits.

BBC: Q&A: Liquid water on Mars