Previously: • Spot the fake smile • Americans smile, Brits grimace? The post How an 1800s French doctor's experiments with electrocuted faces revealed science of real smiles appeared first on ...

the key difference between this “real” happy smile and a “fake” happy smile lies in the orbicularis oculi – muscles that wrap around the eyes. All smiling involves contraction of the ...

Unfortunately, experts aren't sure whether the results carry over from the lab to the real world ... you may follow the ...