Geology
It could reveal how the planet formed.
Have a burger instead.
This is the underdog story we've all been waiting for
'Think of putting a cat in a box of packing peanuts.'
'Reminder of how dangerous and unpredictable volcanoes can be.'
People were hit by 'lava and boiling rocks'.
They could help our search for life on Mars too.
And it's 175km long...
It's 94 per cent underwater.