By Dr. Russell Humphreys A significant fraction of the earth’s radioactive elements, particularly uranium and thorium, appear to be in the granitic rock of the upper continental crust. …read more
Read more here: AIG Daily
By Dr. Russell Humphreys A significant fraction of the earth’s radioactive elements, particularly uranium and thorium, appear to be in the granitic rock of the upper continental crust. …read more
Read more here: AIG Daily
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