Its lava doesn’t even have that signature orange glow, and instead looks like thick steaming mud. Though still hot enough to kill, a worker did survive falling into Ol Doinyo Lengai back in 2007.

Video footage shows a geologist scooping molten lava into a bucket of water before it is taken away for testing. The lava has a thin crust on it that's caused by air cooling, so the geologist has ...