About 1,500 rice seeds that completed a 23-day space journey with China’s probe have grown leaves in a greenhouse in Guangzhou, China. These rice seeds traveled more than 760,000 kilometers to the moon last November and returned to Earth on December 17th. The space-exposed seeds were planted in Guangzhou at the end of February. After being exposed to cosmic radiation and zero gravity, some seeds mutated and produce higher efficiency and improved quality when planted back on Earth.