But some volcanos are hotter than others. At Ol Doinyo Lengai in northern Tanzania for instance, the lava flows at temperatures so low it is possible (though by no means pleasant) to survive.

The new research reveals that the ground around the summit of Ol Doinyo Lengai volcano, which sits along an active rift zone in East Africa, subsided at a rate of 1.4 inches (3.6 centimeters ...