What is a tear?

Did you know your body makes enough tears every year to fill half a bathtub? It’s true! In this episode, Mira and Finn dive into the wild, slightly slimy, and totally amazing science of tears! You might think crying is just salty water leaking from your eyeballs, but tears are actually a super-advanced biological shield. Discover the microscopic bacteria-chopping ninja enzymes hiding in your everyday basal tears, and find out why chopping onions unleashes a massive flood of reflex tears to wa...