There’s a massive ‘hot blob’ of rock chilling 125 miles under the Appalachian Mountains, and it’s sloooowly heading toward NYC. But don’t freak out—geologists say it’ll take 10-15 million years to get there (if it ever does). The blob is actually why the Appalachians haven’t worn down over time, and it’s not about to erupt or turn the subway into a lava pit. Wild, right? #Science #Geology #NYC