This Was One of the Largest Landslides Ever—So How Did No One See It for Months?Ria Misra11/09/15 1:00pm343EditPromoteGo to permalinkHow big is this landslide in China’s Tonzang valley? Big. So big that it created many (many!) new lakes. So big that, at just one of its three major points of origin, it shifted 395 million (million!) tons of earth. But it didn’t just happen—it actually occurred back in July. So why are we only seeing it now?