Why laughter is so contagious

<p>If you want to hear what a laughing rat sounds like this podcast is for you. From why the sound of laughter triggers us to join in, to how a laughing yoga class starts, to the difference between AHA and HAHA in science, <em>IDEAS </em>contributor Peter Brown takes us on a joyride to reveal the mystery of laugher. Will this podcast make you laugh? Most likely. But it's better than catching a cold. <em>*This episode originally aired on Nov. 4, 2020.</em></p>