How scientists use shards of pottery, remnants of other vessels to learn more about ancient diets July 31, 2021 +1 figuring out what’s contamination and what’s actually worth studying.. IFTTT Science Washington Post Writer explains the archaeological art of finding food remnants on old objects figuring out what’s contamination and what’s actually worth studying.. IFTTT Science Washington Post Writer explains the archaeological art of finding food remnants on old objects