• Question: why dont we have tails (coxsyx) why has it kinda been chopped of

    Asked by oliverrayner21 to Lisa on 2 Jul 2012.
    • Photo: Lisa Fitzgerald

      Lisa Fitzgerald answered on 2 Jul 2012:

      hi @oliverrayner21,

      The coccyx bone is fairly small in the human as we have evolved to no longer need a tail and therefore it was shrunk over time. Monkeys need a tail to maintain balance when climbing in trees etc. However as we evolved to live on the ground without jumping long distances or balancing on branches etc we no longer had an evolutionary advantage for one.