December 8, 2011 6:22 am The Science Of Tantrums New research shows what’s behind toddler meltdowns. US & World Videos 3:46 Orange County doctor provides life-changing cleft palate surgeries in Vietnam 3:12 Groundbreaking new device targets liver tumors 5:38 SoCal family wins $11M settlement against mental health facility 2:17 Kaiser Permanente reaches tentative agreement with union 1:21 Why some are getting Botox shots on arms