ELIXIR OF LIFE: Finding evidence of water in the solar system and beyond is an important signpost for the presence of life. Liquid water is a solvent, a medium and a catalyst for certain types of proteins, and essential to biological processes. © ISTOCKPHOTO.COMFrom Scientific American:
Mars, Europa, interstellar nebulae, and now even the moon all seem to be getting wetter with every observation. But what is it about this simple hydrogen-oxygen combo that makes it the sine qua non of finding extraterrestrial life?
When NASA announced last month the finding of water ice in several impact craters on Mars, and either water or hydroxyl widely dispersed on the moon's surface, the solar system became a little more familiar because it seemed a tad more hospitable to life as we know it on Earth.
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