Chinese volunteers complete 200 days on virtual 'Moon base'
Four Chinese students have successfully completed 200 days living self-sufficiently in an isolated "lunar lab" to simulate a long-term space mission, as the country prepares for its goal of putting people on the Moon. Called Yuegong-1 or "Lunar Palace-1", the 160-square-metre facility recycled human waste with a bio-fermentation process using which the volunteers grew crops for food and oxygen.