Sept. 30 (UPI) -- Elon Musk -owned xAI plans to launch a challenger to Wikipedia called "Grokipedia" that he said will be a big improvement over the popular open-source website. The site will be powered by the Grok AI chatbot and help xAI to better understand the world and the universe, Mint reported on Tuesday. Musk announced Grokipedia in a pair of posts on X on Tuesday. In one post, Musk invited people to join xAI and "help build Grokipedia," which he described as an "open-source knowledge