As explorers venture farther from Earth and stay longer in the international space station, they will need to grow their own fresh veggies and learn how to be high-tech farmers in zero gravity. Growing food in the starkness of space is a challenge that researchers from the University of Florida and NASA will tackle at a new Center for Space Agricultural Biotechnology Research and Education, or SABRE, to be unveiled Monday at the Kennedy Space Center in Brevard County. “It’s all about biology in space, and plants in particular,” said Mike Martin, UF vice president for agriculture and natural resources. “We’ve got to figure out how to grow food on the way to Mars.”