The broader your smile and the deeper the creases around your eyes when you grin, the longer you are likely to live, according to a study published in Psychological Science this week.
Researchers led by Ernest Abel of Wayne State University in Michigan studied 230 photographs of US major league baseball players who started playing before 1950 and grouped them according to their smiles.
The players were rated as "no smile" if they were just looking deadpan at the camera; as "partial smile" if only the muscles around the mouth were involved in their grin; or as "full smile" if the mouth and eyes were smiling and the cheeks were both raised.
The players' pictures were taken from the 1952 Baseball Register, a listing of professionals that is packed with statistics such as year of birth, body mass index, marital status and career length, which reflects physical fitness.
source: timesofindia
