SCIENCE OF SMILE 😃

(1)Smiling is a universal human gesture. In his travels Charles Darwin discovered that smiling was the only facial expression which was recognised instantly all over the world.

(2) A smile is easy to see. It is possible to recognise a smile on someone's face at a distance of 45 metres You'd have to be much eloser to decide whether the person was showing surprise, anger or fear.

(3) It takes only one facial muscle to smile. This is the zygomatic major muscle, which reaches down from the cheekbone to the corners of the lips. To look sad or angry, you need to use at least two muscles.

(4) Smiles are good for your health Studies in the USA have shown that when you smile your heart rate slows down, your blood pressure goes down and the body begins to relax. This happens whether you are feeling happy or not In fact, if you're feeling unhappy, the simple act of smiling is the first step to feeling better.

(5) A smile makes you attractive. According to American dentists Melvin and Elaine Denholtz, an attractive smile should show most of the upper teeth, at least two thirds of the length, and just the tips of the lower teeth. (6) When you smile a real smile, two things happen to your face: your lips move up towards your cheeks, and your cheeks themselves go up and gather in the skin around the eves. And a real smile will usually only last for up to four seconds. False smiles are seen on the faces of politicians who have just lost an election, people whd feign they're pleased to see you, and door-to-door salesmen False smiles usually appear slightly too early or too l atee, and they tend to go on for too long.

(7) But if vou really want to know if a smile is real or false, look at the eyes. In a false smile these don't change-however much the person has practised smiling.

(8) Eves are important in other ways, too. When you feel good, your pupils get larger; when you feel had, they become small. Ancient Chinese traders always looked at their customers straight in the eve. Ifthe pupils became big, the person was interested, and they could ask for more money.