Siberia's 'doorway to the Underworld' Is Getting So Big It's Uncovering Ancient Forests

It's no secret that Siberia's permafrost has been on thin ice lately. Conditions are varying so much that huge holes are appearing out of nowhere , and, in some places, tundra is quite literally bubbling underneath people's feet .
Read more: http://www.sciencealert.com/siberia-s-huge-doorway-to-the-underworld-is-getting-so-big-it-s-uncovering-millennia-old-forests-and-carcasses?source=Snapzu