SpacePRIDE Team members Chris Williamson, right, and Rob Moore, second from right, answer questions from 8th grade Sullivan Middle School (Mass.) students about their robot on Friday, June 15, 2012 at the Worcester Polytechnic Institute (WPI) in Worcester, Mass. SpacePRIDE's robot team will compete for a $1.5 million NASA prize in the NASA-WPI Sample Return Robot Centennial Challenge at WPI. Teams have been challenged to build autonomous robots that can identify, collect and return samples. NASA needs autonomous robotic capability for future planetary exploration. UPI/Bill Ingalls/NASA