Leonardo Da Vinci famously said, “The human foot is a masterpiece ... a pulley system composed of bones, muscles, tendons and ligaments that propels the foot forward for walking and running.

Walking and running upright on two feet as humans do requires some specialized adaptations of the skeleton and muscles. Modern human anatomy has built on the strengths and the weaknesses of a body ...

The biologists are planning more work looking at other parts of the human body in detail. They have already studied the feet and know extra muscles develop and disappear there too while babies ...