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New Study Reveals Ancient Microbes' Role in Evolution of Complex Life

KVIA•Wednesday, March 4, 2026 at 8:25 PM•CNN Newsource

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Recent research sheds light on the origins of complex life on Earth, focusing on Asgard archaea, microbes believed to be ancestral to eukaryotes. These microbes, previously found only in oxygen-deprived environments, have now been discovered in shallow coastal sediments, indicating their ability to tolerate and utilize oxygen. This adaptation may have played a crucial role in the evolution of complex life forms following the Great Oxidation Event, which occurred between 2.4 and 2.1 billion years ago. The findings suggest that Asgards were already equipped to process oxygen, facilitating their merger with other microbes to form eukaryotes. Understanding this evolutionary step could provide insights into how complex life emerged on Earth.

Key Details: • Study published on February 18 in the journal Nature. • Asgard archaea were named after Norse mythology, highlighting their historical significance. • Research indicates that eukaryotes evolved from Asgard microbes adapting to oxygen-rich environments.

research evolution ancient-life microbiology asgard

People & Organizations

Brett BakerBuzz BaumNorth Atlantic OceanLoki's CastleUniversity of Texas at AustinMedical Research Council Laboratory of Molecular Biology

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