Our Water's Older than Our Sun

September 26, 2014 11:02 AM

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Our Water's Older than Our Sun

Water was crucial to the rise of life on Earth and is also important to evaluating the possibility of life on other planets. Identifying the original source of Earth’s water is key to understanding how life-fostering environments come into being and how likely they are to be found elsewhere. New work from a team, including the Carnegie Institution’s Conel Alexander, has found that much of our Solar System’s water likely originated as ices that formed in interstellar space. Their work is published in Science.

Water is found throughout our Solar System. Not just on Earth, but on icy comets and moons, and in the shadowed basins of Mercury. Water has been found included in mineral samples from meteorites, the Moon and Mars.

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