Irritability is so often associated with aging that it's spawned a familiar stereotype — the "grumpy old man." From Ebenezer Scrooge to Walt Kowalski in Gran Torino, pop culture has long portrayed ...

For many parents, the transition to parenting teenagers is an abrupt and surprising one. Their once cute and cuddly child has turned into a sullen, angry, and self-absorbed teenager who seems happiest ...