This cute baby started smiling instead of crying when she was handed a puppy. (Jukin Media) This video opens to show a baby cooing and crying for a bit.

When your baby won't stop crying, ... Birth to Age 5.” “One is looking cute, and the other is crying. These tools are limited in scope, but they’re not limited in power.

Some things, like cute babies, are pretty much universal. Others, like the amount of time they keep their parents up at night, may not be. New research published in the Journal of Pediatrics ...