PHOENIX--(BUSINESS WIRE)--May 16, 2013 – Madelyn Lucas, 14, from Farmington, N.M. explained her research project on probiotics’ affect on the digestive system to an eager group of middle schoolers at the Intel International Science and Engineering Fair, the world’s largest high school science research competition. More than 1,600 high schoolers from 70 countries, regions and territories are competing for more than $4 million in awards this week. PHOTO CREDIT: Intel/Chris Ayers