The M&M anomaly (Classic)

Despite costing the same price, a pack of peanut butter M&M's weighs 0.06 ounces less than a pack of milk chocolate M&M's. A trade secret explains why. | Subscribe to our weekly newsletter <a href="https://www.npr.org/newsletter/money?utm_source=rss_feed_copy&utm_medium=podcast&utm_term=planet_money">here.</a>