Human beings venture into the highest parts of our planet at their peril.
Some might think that by climbing a great mountain they have somehow conquered it,
but we can only be visitors here.
This is a frozen, alien world.
This is the other extreme. One of the lowest, hottest places on Earth.
It's over a hundred metres below the level of the sea.
But here, a mountain is in gestation.
Pools of sulphuric acid are indications that deep underground there are titanic stirrings.
This is the Danakil Depression in Ethiopia, lying within a colossal rent in the Earth's surface
where giant land masses are pulling away from one another.
Lava rises to the surface through this crack in the crust, creating a chain of young volcanoes.