Before frat parties, there were frog ponds. Literal breeding grounds for some of the world’s noisiest bachelors, these lusty pools are where amphibians gather to woo mates. …Some spots host hundreds of males from a dozen species, each belting out serenades that can register at more than 100 decibels apiece—close to what you’d hear at a rock concert. Sounds this intense can cause hearing loss… When scientists visit these ponds, they often don earplugs. “It hurts our ears,” says Kim Hoke, a biologist at Colorado State University. …If frogs of the female persuasion can’t identify their own species’ calls in this terrifying soundscape, they may lose out on an opportunity to reproduce. Fortunately, evolution has come up with a clever trick… [their lungs accomplish this by] muffling the ruckus of other species. Frog lungs, Lee’s team has shown, are basically noise-canceling headphones that also happen to oxygenate the blood.