Scientists discover giant crater from ice age explosion that has methane-spewing mud volcano inside it
The Borealis Mud Volcano is only the second found in Norwegian waters and releases a continuous stream of methane-rich, muddy liquid from deep below Earth's crust.
TroibNews 
The Borealis Mud Volcano is only the second found in Norwegian waters and releases a continuous stream of methane-rich, muddy liquid from deep below Earth's crust.
