Mauna Kea When you think of the tallest mountains, instinctively, Mount Everest comes to mind. But here's a shocker: Mauna ...

Mount Everest is the tallest mountain above sea ... hotspot - a plume of liquid magma from deep inside Earth. It last erupted about 4,600 years ago. You can tell just how giant Mauna Kea really ...

The eruption would shoot a tower of ash into the air, taller than Mount Everest, covering nearby cities in over a meter of ash and creating giant clouds that would block the sun for decades.