Ancient hookups gave chimps a smidge of bonobo DNA
Genetic analysis traces previously unknown primate hybridization
![chimpanzee and bonobo](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/10/102616_TI_chimp-bonobo_main.jpg?fit=860%2C460&ssl=1)
KISSING COUSINS Chimpanzees (left) and bonobos (right) interbred in the past. Genetic evidence of that mixing was found in a new study.
Kevin Langergraber; Pierre Fidenci/Wikimedia Commons (CC BY-SA 2.5)