At first, Abigail Allwood saw nothing wrong with Allen Nutman's claims.
In August 2016, Nutman, a geologist from the University of Wollongong, announced that he and his colleagues had found the world's oldest fossils in an outcrop in Greenland. The team discovered rows of inch-high conical humps embedded in 3.7-billion-year-old rocks, and interpreted them as stromatolites—layered mounds created by colonies of ancient marine bacteria. The oldest accepted stromatolites, from the Pilbara region of Australia, are 3.5 billion years old. Nutman's finds were 200 million years older.
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