We've all done it -- shouted before thinking, cried inappropriately or shot an angry glare at a stranger on the tube, not abiding by sardine-can etiquette. It's this drift, the ease with which we can ...

Dan Seifert is an editor overseeing The Verge’s product reviews and service journalism programs. Dan has covered the technology world for over a decade at The Verge. Humans use facial expressions to ...