The Massive Chunk of Metal Hiding in the Moon Posted on 2022/02/15 by Carl Robitaille The moon's South Pole-Aitken basin is the largest known crater in existence, and there's something big hidden underneath!https://t.co/tr82p6DsXW pic.twitter.com/4eHnnHRvn6— SciShow (@SciShow) February 12, 2022