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Are you mom and dad's favorite? Science explains why

A new study shows why some siblings appear to be their parent's favorite.

http://www.wgrz.com/video/4187689003001/1/Are-you-mom-and-dads-favorite-Science-explains-why http://videos.usatoday.net/Brightcove2/29906170001/2015/04/29906170001_4187683871001_thumbnail-for-video-4187467368001.jpg?pubId=29906170001 Are you mom and dad's favorite? Science explains why A new study shows why some siblings appear to be their parent's favorite. science behind favorite siblingsvpcbestnewsbestfavorite childvpcNational Newssiblings 02:16

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