Not all yawns are created equal: you're more likely to 'catch' a yawn from a family member than a stranger, researchers report.
Source: http://www.cosmosmagazine.com/news/5101/contagious-yawning-stronger-amongst-family
Emilie de Ravin Emma Heming Emma Stone Emma Watson Emmanuelle Chriqui Emmanuelle Vaugier Emmy Rossum Erica Leerhsen
