Monday, November 16, 2015

Water, Water, Everywhere....

An article from Nature, entitled "The Global Volume and Distribution of Modern Groundwater," estimates that the total groundwater in the upper 2 km. of crust is 22.6 million cubic kilometers. The article focuses on "modern" groundwater (i.e., renewable), rather than "ancient" groundwater, but it is interesting to observe how much water there really is. And, on a related note, the Smithsonian Magazine reports: "'It seems Earth inherited its water directly from dust in the disk,' Hallis says. 'Therefore, Earth’s water was accreted during the planet’s formation, rather than being added later by impacting water-rich material.'" Reminds me of this from Genesis, Chapter 1:
 6 ¶And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. 
 7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so. 
 8 And God called the firmament Heaven. And the evening and the morning were the second day.

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