A psychologist explains the evolutionary and psychological roots of laughter, and what an infant’s giggles teach us about how adults bond. There’s nothing quite like bearing witness to a baby’s first ...

Few things are as heartwarming as hearing a baby's first laugh. I’ve experienced that moment with four children of my own, and that tiny, infectious sound isn’t just a special memory; it also marks a ...

Add Yahoo as a preferred source to see more of our stories on Google. Every time a baby laughs, a fairy gets its wings. Every Tinkerbell-obsessed child (or parent, for that matter) knows that to be ...

We have all seen this moment countless times: a baby enters the world and bursts into tears. It is so common that we rarely stop to wonder why it happens. Why do newborns cry instantly after birth?

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