Key points from article :
Phil Nuytten has spent decades inventing submarines and underwater suits.
Plans to use same technology to build a colony at the bottom of the ocean.
Vent Base Alpha will be at 1 atmosphere pressure - the same as sea level.
Built in deep water near thermal vents which are over 500 degrees Centigrade.
Would be powered by a Stirling Cycle Engine using temperature differential.
Has also pioneered several diving techniques.