Science expert Dan Souza demonstrates the science of persistent firmness.Get our recipe for Slow-Cooked Whole Carrots: https://cooks.io/3UqyApIABOUT US: The mission of Americas Test Kitchen (ATK) is to empower and inspire confidence, community, and creativity in the kitchen. Founded in 1992, the company is the leading multimedia cooking resource serving millions of fans with TV shows (Americas Test Kitchen, Cook's Country, and Americas Test Kitchen: The Next Generation), magazines (Cooks Illustrated and Cooks Country), cookbooks, a podcast (Proof), FAST channels, short-form video series, and the ATK All-Access subscription for digital content. Based in a state-of-the-art 15,000-square-foot test kitchen in Bostons Seaport District, ATK has earned the trust of home cooks and culinary experts alike thanks to its one-of-a-kind processes and best-in-class techniques. Fifty full-time (admittedly very meticulous) test cooks, editors, and product testers spend their days tweaking every variable to find the very best recipes, equipment, ingredients, and techniques. Learn more at https://www.americastestkitchen.com/.If you like us, follow us:http://americastestkitchen.comhttp://facebook.com/americastestkitchenhttp://twitter.com/testkitchenhttp://instagram.com/testkitchenhttp://pinterest.com/testkitchen