May 10, 2017 11:35 pm A Cooler Workout Obesity is the top cause of preventable, early death in the United States, followed by diabetes. That’s not surprising to the Joslin Diabetes Center in Boston, which promotes a “cool” approach to weight loss. US & World Videos 1:26 What is botulism? 1:32 How to prevent mosquito bites 4:57 Everything you need to know about IVF 1:11 What is ‘factitious disorder imposed on another,' or FDIA? 0:34 FDA expands eye drop recall to include 27 additional products