Oceans

Tuna bounce back, but sharks in 'desperate' decline

Hermit crabs mistake plastic pollution for food

Renewed quest to find Shackleton's lost ship

Moored pandemic cruise ships 'scarred' seabed

Mapping quest edges past 20% of global ocean floor

The rapid rise of robot boats. Video, 00:01:35The rapid rise of robot boats

‘Really, really rare’ seahorse spotted off UK coast. Video, 00:01:44‘Really, really rare’ seahorse spotted off UK coast

Underwater avalanche continued for two days

'Longest sediment flow ever measured in action' Audio, 00:14:50'Longest sediment flow ever measured in action'

Fly through the underwater Congo Canyon. Video, 00:01:33Fly through the underwater Congo Canyon

Science drill ship sets depth record off Japan

The Antarctic ice shelf in the line of fire

Discovering over 100 new mountains under water. Audio, 00:01:53Discovering over 100 new mountains under water

Oceans' extreme depths measured in precise detail

Deepest parts of Earth's oceans mapped in detail. Video, 00:00:39Deepest parts of Earth's oceans mapped in detail

How rising sea levels are threatening my home. Video, 00:03:46How rising sea levels are threatening my home

The Cornish hut with the tallest of tales to tell

Volunteers plant seeds to restore seagrass meadows

Costing the Earth. Maritime Nation. Audio, 28 minutesCosting the Earth

Sub dives to deepest-known shipwreck

Capturing 'flash rips' and the 'edge of the world' Video, 00:02:30Capturing 'flash rips' and the 'edge of the world'

Protect our ocean 'to solve challenges of century'

German ship squeezes through narrow ice channel