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مشاهدة النسخة كاملة : Catching a yawn is 'linked to age'


BECKHAM
15-03-2014, 10:53 AM
Contagious yawning is linked more closely to age than tiredness or empathy, US researchers find, and reduces as people get older.

for more .... (http://www.bbc.co.uk/news/health-26587535#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa)