Botswana has the highest population of elephants in the world - around 120,000.
One man who gets closer to them than most is scientist Dr Michael Chase.
Fast Track travelled to the northern region of Chobe to see him in action.
Watch the full report on Fast Track on the BBC World News channel on Friday 29 October at 2230 GMT, Saturday at 1230 and 1830 GMT or Sunday at 0730 GMT.
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