Ever wonder why crickets sound like nature’s broken smoke detector? Turns out they’ve been chirping away since before dinosaurs were there. In this new True Facts video, Ze Frank dives (and jumps) into the wild, noisy, leg-powered world of crickets and their cousins. These little sound machines have knees that launch like rockets, ears in their legs (or butts, if you’re a grasshopper), and a talent for romantic screaming that puts your upstairs neighbors to shame. Check it out!