The Guinness Book-certified quietest place on Earth is this anechoic chamber at Orfield Laboratories in South Minneapolis, Minnesota. It has 3.3-foot-thick fiberglass acoustic wedges inside double walls of insulated steel and foot-thick concrete. The company’s founder and president, Steven Orfield, says “We challenge people to sit in the chamber in the dark; one reporter stayed in there for 45 minutes,” the longest anyone has survived  the room without going mad. “When it’s quiet, ears will adapt,” says Orfield. “The quieter the room, the more things you hear. You’ll hear your heart beating, sometimes you can hear your lungs, your stomach gurgling loudly. In the anechoic chamber, you become the sound.” Cue The Twilight Zone theme and continue reading.