An unmanned Chinese probe touched down on Earth on Tuesday, bringing back samples from the far side of the Moon in the world's first such mission, with President Xi Jinping extending his congratulations, according to state-run media.The Chang'e-6 spacecraft, launched on May 3, successfully landed in a designated area in the country's Inner Mongolia Autonomous Region, the China National Space Administration said.Analysis of the samples is expected to help scientists find out about the Moon's origins and structure. The project is part of China's efforts to become a space power and take the le…READ FULL ARTICLE