(AP) — In this April 17, 2013 photo provided by the University of Hawaii, researchers studying what meals astronauts might eat on a mission to Mars organize food inside a simulated Martian base dome on Mauna Loa, Hawaii.
Six researchers have spent the past four months living in a small dome on a barren Hawaii lava field at 8,000 feet, trying to figure out what foods astronauts might eat on Mars and during deep-space missions. (AP Photo/University of Hawaii, Sian Proctor)