Earlier than billionaires dreamed of organising communities on Mars, the ocean was seen as the subsequent frontier in human habitation. Reviving this dream is Deep, a venture backed by an nameless millionaire to the tune of greater than £100m that goals to determine a ‘everlasting human presence’ underneath the ocean from 2027. Guardian Seascape editor Lisa Bachelor visited the venture simply outdoors Chepstow on the Welsh border, and tells Madeleine Finlay what scientists hope to be taught concerning the ocean by spending prolonged intervals residing underwater
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