A smile can be so contagious. You know how hard it is not to yawn after seeing someone else do it, so just imagine keeping a straight face when someone is smiling hard right at you. When someone is ...

Seeing animals happy makes others also feel happy. This is a given but there are some animals who have a naturally smiling faces. This may be because they have a certain face structure or eyes. After ...

We're helping you flex those cheek muscles on this International Day of Happiness with these 12 smiling animal photos. Click and beware: You're sure to flash a big grin!

Prepare to have your day well and truly made, because there has been a competition to find the UK's smiliest pet and the pictures are too much. The Winning Smiles contest, held by The National Office ...

THIS grinning gorilla shows it’s not just Goldie the pufferfish who has plenty to be happy about. Goofy Goldie featured in yesterday’s Sun, right, after she had tooth surgery to help her eat. Please ...