Human laughter may trace its evolutionary beginnings to vocalizations made during play. This type of "laughing" is found in many mammals and even in some birds.

If you thought laughter was just a human trait, you couldn’t be more wrong. Many animals have their own unique ways of expressing joy. If you’ve ever watched a dog with its tongue flopping out or seen ...

Dogs express joy through playful signals like relaxed panting and loose body language, akin to human laughter. These cues, ...