In the quiet chemistry of a methane-producing microbial community, scientists have witnessed something evolution rarely makes visible: a gene attempting to leap between species. Researchers at the Max Planck Institute for Marine Microbiology discovered that a predatory bacterium's intron RNA — shaped into a protective ring — survived inside the dead cells of its prey, revealing an entirely new pathway for horizontal gene transfer. This circular RNA structure, stable where linear molecules would decay, suggests that life has more routes for sharing its genetic instructions than biology had prev