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Human beings are a particular type of mammal. In this compelling clip, we see a tribesman runner pursue his prey through the most harsh conditions in a gruelling eight hour chase. Thought provoking content from the BBC’s Life of Mammals documentary series. Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth

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