granite - the creation rock?, page-12

  1. 7,404 Posts.
    gramatical error (gotta keep an eye on that auto pilot)

    "the article mentions the migration of of radon-222 gas (a precursor of an isotope of polonium), and the an explanation to refute it."

    should read as:

    the article mentions the migration of of radon-222 gas (a precursor of an isotope of polonium), as an explanation to refute it.
 
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