Focus-Science and Technology - - Q & A -

1. Smil­ing prob­a­bly evolved from dis­plays of so­cial sub­mis­sion. Chim­panzees make a smil­ing face when they are afraid. In hu­mans this may have later evolved into an ex­pres­sion to dif­fuse ag­gres­sive en­coun­ters. 2. Now that smil­ing in­di­cates a pos­i­tive mood, it’s also cor­re­lated with re­duced stress hor­mones and blood pres­sure. Nu­mer­ous stud­ies have linked both of th­ese to your chances of hav­ing a heart at­tack. 3. Mar­riage also low­ers your heart at­tack risk and a 2009 study found that peo­ple who frown in col­lege year­book photos are five times more likely to get a di­vorce than those who smile. 4. And over­all, smil­ing cor­re­lates s with good health. . Re­searchers who looked at photos of 230 base­ball pro­fes­sion­als from the 1950s found that the players with the most gen­uine smile­sil tend­edtdd tto live the long­est.

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