World's Smallest Ear Can Hear Germs

World's Smallest Ear Can Hear Germs : Discovery News: "A pin dropping is pretty quiet. But what about a bacterium? Hearing anything smaller than a certain size would ordinarily be tough to do. But not if you have "nano-ears." This kind of ear is a microscopic particle of gold trapped by a laser beam and can pick up sound a million times fainter than humans can usually hear."