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Why are so many whales washing up?

Another 50 pilot whales die off NZ

Whale hunt turns sea red with blood

'The night I found 145 stranded whales'

How does whale poo help to keep oceans healthy? Newsday. Audio, 00:03:51How does whale poo help to keep oceans healthy?

Witness History. The Antarctic Whale Hunters. Audio, 9 minutesWitness History

Almost 150 whales die on New Zealand beach

Mass whale stranding in New Zealand. Video, 00:00:24Mass whale stranding in New Zealand

Science In Action. Goodbye Jet Engine? Audio, 27 minutesScience In Action

Humpback whales in 'cultural revolution'

Humpback whale choristers learn new songs. Video, 00:00:28Humpback whale choristers learn new songs

Whale 'had 115 plastic cups' in stomach

Benny the beluga still in River Thames

Hope for mountain gorilla and fin whale

A 'retirement home' for showbiz whales. Video, 00:02:36A 'retirement home' for showbiz whales

Scientists count whales from space

Counting whales from space. Audio, 00:13:12Counting whales from space

Body of newborn sperm whale washed ashore

Fireworks on hold for beluga Benny's safety

New atlas of west coast marine wildlife

Thames beluga whale being monitored. Video, 00:00:56Thames beluga whale being monitored

Benny the beluga 'cannot be hauled out'

Thames whale still 'foraging normally'