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A rare behind the scenes look at the Pacific power tussle

Surging seas are coming for us all, warns UN chief

Weight loss TV programme has been 'life-changing'

'I learned to play rugby with a water bottle'

Tonga media guide

Tonga country profile

Unexpected Elements. One year on from the Tonga eruption. Audio, 57 minutesUnexpected Elements

Tonga volcanic eruption reshaped Pacific seafloor

How a volcanic flow moves along the seafloor. Video, 00:00:28How a volcanic flow moves along the seafloor

Robot boat maps Pacific underwater volcano

Driving a robot boat on the other side of the world. Audio, 00:06:48Driving a robot boat on the other side of the world

UK robot boat maps Pacific underwater volcano. Video, 00:00:23UK robot boat maps Pacific underwater volcano

Folau injured on Test return for Tonga

Unexpected Elements. Heat death by volcano and other stories. Audio, 57 minutesUnexpected Elements

Immense crater hole created in Tonga volcano

Explosive Tonga volcano 'surprisingly intact'

Tonga eruption was 'record atmospheric explosion'

Professor snorkels over Tonga volcano

Robot boat to map Tonga volcano aftermath

Tonga internet link restored after eruption

Tongans suffering trauma from disasters, says PM

How the volcano cut off Tonga's access to money

Tattoo community helps tsunami victim's husband