Fake or polite smiles, on the other hand, usually involve only the mouth muscles. The eyes remain wide or indifferent, and ...

A new study published in the journal Neuron provides evidence that biological sex differences in brain function and hormone ...

By Dave Steve​ Any views or opinions expressed in this column are of the individual, group, or entity who submitted it ...

You’ve probably heard the claim that it takes more muscles to frown than to smile. It’s usually framed as a feel-good reason to turn your frown upside ...

By David Stephen Any views or opinions expressed in this column are of the individual, group, or entity who submitted it ...