“We have $100 million worth of equipment downstairs. And the dog can beat me?” MIT scientist Andreas Mershin asks. “That is pissing me off.” Mershin aims to develop a bot that detects an antigen that can be an indicator of prostate cancer. It’s one that properly trained dogs can sniff out with 90% accuracy. The physicist’s lab, Label Free Research Group, is attempting artificial olfaction, and while “robots these days can see, hear, speak, and (crudely) think,” scent is harder to pinpoint. To learn more about Mershin’s mission to build an artificial nose and classify odors, head over to Wired.