Emmanuel Mendoza has been experimenting with pea plant growth using varying amounts of insect waste, known as "frass." Credit: Texas A&M University Engineering Once we travel to another planet, we'll face the next challenge—how to survive. Emmanuel Mendoza began tackling that problem in his parent's garage during his senior year of high school. "I've always been interested in human space systems, specifically, how we grow or how humans live in long-term space environments," said Mendoza, an aero...