Saving Antarctica - a podcast by BBC World Service

In October 1991, an international protocol to protect the world’s last wilderness, Antarctica, from commercial exploitation was agreed at a summit in Madrid. Louise Hidalgo talks to one of the environmentalists who led a successful campaign to protect the ice continent. Also, how meditation changes the brain, the Iraqi "supergun affair", and political art in Nigeria.

Picture: Blue icebergs in Antarctica (Credit: Getty Images)

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