We tend to think of humans evolving to upright posture as just like a horse or dog walking on its hind legs. I think these images of a sitting horse and a sitting human will make it clear we humans made some major shifts from the basic quadruped design. Note:
~ Roedy (1948-02-04 age:69)
- How much longer the human thigh bone from the pelvis to the knee is in proportion.
- How much further back the horse head sits.
- How much longer the horse tarsal bones in the foot are. They are an extension of the leg. High heel shoes prop the tarsal bones up so they behave more like an extension of the leg the way they do in the horse.
- How the horse fore and hind limbs naturally poke straight out from the body, where the human’s naturally droop straight down.