Multiple outlets report a genetic study showing that cockroach genomes include large amounts of DNA originally transferred from bacterial endosymbionts. The research describes how cockroaches maintain symbiotic relationships with bacteria inside their bodies, and that these bacterial partners contribute genetic material that becomes incorporated into the host’s genome over evolutionary time. Coverage emphasizes that the transferred DNA is not random; it forms part of the cockroach genome repertoire and can include sequences associated with the endosymbionts’ biology. The findings are presented as evidence that this genetic exchange has persisted for millions of years, meaning cockroach genomes carry a record of long-term host–microbe coevolution. Outlets vary slightly in wording and emphasis, but they converge on the same core point: cockroach genetic makeup contains extensive bacterial-origin DNA, reflecting deep evolutionary history and ongoing or historical symbiosis. The reports frame the work as an example of how endosymbionts can shape animal genomes beyond their immediate biological roles.