An AI can tell whether ancient faeces came from a person or a dog

Dog faeces can still be troublesome thousands of years after being dumped. Archaeologists can end up in deep doodoo if they mistake it for human faeces. But now an artificial intelligence system has been developed to discern the two. Ancient faeces, or coprolites, can be a valuable source of information about the identity, diet and health of people who lived thousands of years ago. But dog faeces, which are a similar size and shape, are also common at many archaeological sites.