Beyond social bonding, play (of which laughter is a part) is critical for learning. It changes brain chemistry and fosters neuroplasticity. You see play in all

Beyond social bonding, play (of which laughter is a part) is critical for learning. It changes brain chemistry and fosters neuroplasticity. You see play in all mammals - most of which are subject to similar evolutionary logic: few offspring, extensive nurturing out of the womb, learning phase extends into and beyond adolescence, social. This is harnessable in our lives: laugh more and play more to be more flexible and to continuously learn. And to have friends!