A newly developed artificial intelligence system may be able to distinguish between ancient human and dog poo, on sites where both species once cohabited.
The team of researchers who write in the journal PeerJ may be able to differentiate between the thousands-of-years-old stool samples through DNA data.
Analysing the fossilised faeces could help discover a lot more about diet, health and the identity of who pooped, reports Smithsonian Mag.
Years ago, human and canine DNA often got mixed up because dogs would roam around and snack on human faeces. Human's would often, at times, eat dog meat - all of which would make it difficult to tell both defecator's poo's apart.