We usually associate emotional tears with sadness and grief. Why, then do we also cry when we're overcome with positive emotions like joy or relief? Yale psychologist Oriana Aragon co-authored a ...

The video has 1,700 reactions and nearly 70 comments. “Crying happy tears for this young man and London!” one person wrote. “Truly heartwarming love this!” another commented.

"I knew he'd be happy, but I wasn't quite expecting ... A heartwarming moment has gone viral after an Iowa man broke down in tears of joy when he learned that his newborn grandson was named ...