We usually think of smiles as a reaction to feeling happy. But there are several reasons to make the effort to smile, even when you don’t feel like it. Psychology research in several areas has ...

She wags her tail, signalling she is happy, but her fanged smile is amusingly menacing. Pet owner Tuktik Noppanan said: 'Ava always smiles when she is happy, but some of my friends said she looks ...

You probably know the classic childhood rhyme: “Make new friends, but keep the old. One is silver and the other, gold.” Even though it's a simple sentiment, it's fitting in describing the ...