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5 Live Science Podcast. Gene therapy, the world's biggest penguin, and the threat from bird flu. Audio, 53 minutes5 Live Science Podcast

Penguins return from isolation after flu outbreak

Video shows bottle hit giraffe after zoo break-in. Video, 00:00:28Video shows bottle hit giraffe after zoo break-in

Penguins isolating due to bird flu given all-clear

Penguin pick-me-up for Christmas hospital patients. Video, 00:01:18Penguin pick-me-up for Christmas hospital patients

Postcards and penguins at the world's remotest post office

Eight penguins dead amid bird flu outbreak at zoo

Navy digs out snowed-in Antarctic post office

Alright, Pet? Series 2, Wildlife presenter Michaela Strachan, animal dramas and blood banks. Audio, 56 minutesAlright, Pet?

Baby penguins draw thousands to India zoo. Video, 00:00:55Baby penguins draw thousands to India zoo

How too much ice triggered dramatic penguin decline. Video, 00:02:00How too much ice triggered dramatic penguin decline

Four women to run world's most remote post office

New special boots help Lucas the penguin walk. Video, 00:01:36New special boots help Lucas the penguin walk

Edinburgh Zoo's oldest penguin dies in fox attack

Heatwave: London's penguins keep their cool. Video, 00:00:33Heatwave: London's penguins keep their cool

Zoo welcomes arrival of nine rare penguin chicks

Hospice patient gets penguin wish. Video, 00:01:09Hospice patient gets penguin wish

London Zoo penguin chicks named for Jubilee

Penguins born ahead of zoo's 50th birthday

Record number of penguin eggs at Isle of Man zoo

Penguin power and the 'dream job' in Antarctica

Artist captures Antarctic on polar trip