Tai and his friends all have experiences of being bullied. And, as he learns, it’s a pretty universal thing - even trees are known to bully other trees! Why is such an unpleasant thing so widespread? What is the science behind bullying?

Ask Tai Why: Freckles, video games, and climate-changing farts

Fifteen-year-old Tai Poole won’t rest until he’s uncovered the mysteries of the universe, one probing question at a time. In Season 4 of his Webby-winning podcast, Tai talks to everyone from NASA scientists to stand-up comedians to his equally curious little brother Kien. If you’ve ever wondered why nothing feels as good as a deep belly laugh or why it’s impossible not to finish a bag of Doritos, Tai has you covered.