Last Updated: Monday, May 9, 2011, 15:32
People with a higher number of fat friends are likely to become obese themselves.
Last Updated: Wednesday, March 23, 2011, 12:10
A team of researchers has found that sometimes itching, like yawning, can be contagious.
Last Updated: Thursday, September 16, 2010, 12:29
If somebody yawns it's likely that people nearby will probably do the same.
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