Space news: Tiny moon explorers, a debate about the expanding universe, and more. NPR Why scientists launched two little robots to the moon : Short Wave NPR How a shape-shifting tiny rover inspired by Japanese toys autonomously explored the moon Phys.org Meet LEV-2, a baseball-sized and absurdly cute moon robot Scientific American Adorable, ball-shaped robot 'crawled' across the moon during Japan's historic first lunar landing Live Science