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Allende Meteorite. Photo courtesy of James St. John. Original can be found at https://www.flickr.com/photos/jsjgeology/14601454299/in/photolist-ofhgTR-x2sWy6-owyV8h-su85y4-rxiVEP-rxiVZg-ofhgE4-owKaa3-qpR1iy-pvne7z