More than half of the world's primates are under threat. Meet the scientists making ground-breaking discoveries to safeguard their future.
Episode Duration: 56 minutes and 46 seconds
Episode Number: 3805
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NATURE, television's longest-running weekly natural history series, has won more than 200 honors from the television industry, parent groups, the international wildlife film community and environmental organizations, including the only award ever given to a television program by the Sierra Club.
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