To see if you can spot a genuine smile from a fake smirk, click on the link marked 'gallery' in the blue box below. Each subject has been photographed twice - posing with a real grin and a false ...

Smiling has got to be the only facial expression that strangers think they can command. Smile - and it can be so annoying, right? But while we know that smiling can communicate your happiness or ...

However, only one of these is a “genuine” or Duchenne smile. Discovered by French anatomist Duchenne de Boulogne in 1862, the key difference between this “real” happy smile and a “fake ...