2018 Breakthrough of the Year

Learn about our Breakthrough of the Year: tracking development cell by cell. Nine other advances are recognized as runners-up. Read more - CREDITS --------------------------- producer/editor/animator Chris Burns supervising producer Sarah Crespi narrator David Malakoff special issue editor Colin Norman writers Daniel Clery Eric Hand Meredith Wadman Robert F. Service Gretchen Vogel Jocelyn Kaiser Ken Garber Elizabeth Pennisi visuals messengers from a f