You’ve seen it a thousand times—your dog sees you, and their tail goes into overdrive. But why do dogs wag their tails so much? In this episode of Brainy Bits 90, we dig into a new opinion piece from Biology Letters that explores the neuroscience, evolution, and even the rhythm behind that iconic doggy dance. Bonus: Pepper drops in with a perfectly timed tail thump. Brainy Bets 90. ACF.