Ancient Microfossils May be Earliest Signs of Life

Researchers find what appear to be 3.77 billion-year-old hints of microbial life hidden in Canadian rocks, but some scientists are not convinced.

Written byDiana Kwon
| 2 min read

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Iron oxide-containing tubes from the Nuvvuagittuq belt hydrothermal vent deposits. Matthew Dodd

Scientists may have uncovered microfossils containing evidence of microbes that lived at least 3.77 billion ago, according to a study published yesterday (March 2) in Nature.

“If indeed their analyses and interpretations are correct, then life arose rapidly on Earth, soon after the planet itself began to stabilize,” astrobiologist Kevin Hand of NASA’s Jet Propulsion Laboratory who was not involved in the study, told the National Geographic. “As the froth of geology began to cool, biology established its role as a planetary process.”

University College London researchers analyzed iron-rich rocks from the Nuvvuagittuq belt, an area in northern Canada that, according to geologists, is between 3.77 and 4.28 billion years old. They sliced the rocks to pieces thin enough to study under a microscope, and ...

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  • Diana is a freelance science journalist who covers the life sciences, health, and academic life. She’s a regular contributor to The Scientist and her work has appeared in several other publications, including Scientific American, Knowable, and Quanta. Diana was a former intern at The Scientist and she holds a master’s degree in neuroscience from McGill University. She’s currently based in Berlin, Germany.

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