Delta hypothesis

We went out on the boat today. Manono was swimming in the water. Richard Wrangham from Harvard thinks that bipedalism (standing on two legs) evolved in an environment similar to the Okavanga delta in Botswana where for some parts of the year it was dry, but for the rest of the year it was wet and you had to walk through shallow pools to get to islands where the food was.


Manono is looking for food just like in Richard’s hypothesis. Except he is fishing bananas out of the water that Stany the keeper through in, which is not part of Richard’s hypothesis.
Here is Semendwa being bipedal.


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  1. Posted July 30, 2008 at 4:45 pm | Permalink

    That’s an interesting hypothesis. Frankly, I’d get in the water for bananas, too. I’m sure I love them almost as much as Manono does.


  2. Annie
    Posted July 30, 2008 at 7:49 pm | Permalink

    How funny…..I love both pics! Very cute!

  3. Posted August 1, 2008 at 7:29 am | Permalink

    Beautiful pictures…

  4. Claudio
    Posted August 26, 2008 at 5:00 am | Permalink

    was Manono really swimming? Or wading through water? Apparently there are now reports of orangutans – really swimming!

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