earplugs

The world's largest pyramid isn't in Egypt The Great Pyramid of Cholula, located in Cholula, Puebla, Mexico, is the largest pyramid in the world and—with a base four times the size of the Great Pyramid of Giza—also happens to be the largest monument ever constructed. Part of the reason it's not...

Roosters have built-in earplugs Considering a rooster's call can reach 140 decibels or louder, it might leave one to wonder how the rooster itself keeps from going deaf when that noise is coming right out of its beak. It turns out, the farm fowl have built-in earplugs. Researchers found that...