A strange partnership between two ancient microbes could explain one of evolution’s biggest mysteries — how simple cells first joined forces to create complex life

Researchers found an unusual archaeon physically linked to a bacterium in Shark Bay. Tiny tube-like structures connect these ancient microbes, suggesting resource exchange. This discovery offers a glimpse into early life and the origin of complex cells. Genetic analysis indicates a potential biological trade between the organisms. The finding provides a living system to study theories of eukaryotic evolution.