"You'll never listen to the world the same way again. A truly ear-opening experience!" —Chris Ferrie, award-winning physicist and author of Where Did the Universe Come From? And Other Cosmic QuestionsFor readers of Neil deGrasse Tyson and Bill O'Neill, What the Ear Hears (and Doesn't) is a fascinating science book for adults that explores the physics principle of frequency and the (sometimes weird) role it plays in our everyday lives.What do the world's loneliest whale, a black hole, and twenty-three people doing Tae Bo all have in common?In 2011, a skyscraper in South Korea began to shake uncontrollably without warning and was immediately evacuated. Was it an earthquake? An attack? No one seemed quite sure. The actual cause emerged later and is utterly fascinating: Twenty-three middle-aged folks were having a Tae Bo fitness class in the office gym on the twelfth floor. Their beats had inadvertently matched the building's natural frequency, and this coincidence—harnessing a basic princ