Discovery of new types of microfossils may answer an age-old scientific question

The Gunflint Formation, which straddles Lake Superior’s northwestern shore, contains a treasure trove of geological clues about the evolution of life. After a recent geological reassessment of this area, a research team has unearthed new types of microfossils dating 1.9 billion years. The landmark discovery will help scientists pinpoint the timing and factors that ushered in the evolution of prokaryotes to eukaryotes.

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