Water
'Super sand' to help clean up dirty drinking water
Contaminated water can be cleaned much more effectively using a novel, cheap material, say researchers. Dubbed "super sand", it could become a low-cost way to purify water in the developing world. The technology involves coating grains of...
NASA discovers new evidence of water on Mars
The Mars rover Spirit has found the strongest evidence yet that ancient Mars was wetter than previously thought. The robot analyzed a patch of soil in Gusev Crater and found it was unusually rich in silica. Scientists said the presence of water was necessary...
Photos Reveal: Mars Had Water Underground
Photos from the Mars Reconnaissance Orbiter of the National Aeronautics and Space Administration reveal a landscape of hills and sand dunes punctuated by rock bleached by minerals in ancient underground streams. Those streams of water, or water mixed...
