watch your step

Scientists were baffled last July when they discovered three giant holes in the ground in the Yamal Peninsula in northern Siberia. Now, with the help of satellite imagery, researchers have located four additional craters–and they believe there may be dozens more in the region.

The leading theory is that the holes were created by gas explosions triggered by underground heat or by rising air temperatures associated with climate change, the Siberian Times reported last December.

Huffington Post, 23 Feb 2015

thanks to Andrew Mark Harding