the crunch of a potato chip an apple or a carrot April 21, 2019 by WTFFF Master The crunch of a potato chip, an apple, or a carrot in your mouth creates a mini sonic boom and signals freshness. – WTF Fun Fact Source: https://www.nytimes.com/2013/03/26/health/mary-roach-on-studying-food-and-how-humans-eat-it.html Advertisement Related