New research shows that we regularly transfer traces of our genital microbiomes to sexual partners—a discovery that could someday be used as a crime-solving tool.

A 467-bp region of the mtDNA 16S rRNA gene was subjected to DNA sequencing from 12 Coptotermes species, including 64 populations of C. formosanus. Genetic diversity among species ranged from 1.8% to 7 ...