Even a tortoise enthusiast can speed through a three-day gauntlet of science, engineering and math challenges to claim victory. River Grace, 14, of West Melbourne, Fla., did just that. At an awards ceremony October 1, he picked up the top award of $25,000. The teen was one of 30 finalists from 17 states who attended the third annual Broadcom Math, Applied Science, Technology and Engineering for Rising Stars, or MASTERS, competition.