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Last broadcast on Sat, 3 Jan 2009, 22:15 on BBC Radio 4 (see all broadcasts).
Synopsis
Andrea Catherwood hosts a debate at the Earthwatch Institute at the Royal Geographical Society in London in which five scientists argue the case for the species or organism which they believe is truly irreplaceable.
Broadcasts
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Wed 31 Dec 200820:00
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Sat 3 Jan 200922:15
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