What is the biological cost of a person for the ability to walk upright?

Spinal nerve injury, back pain; flat feet; hernia; phlebeurysm; painful childbirth (a shift in the center of gravity and a change in the proportions of the pelvic bones make it difficult for the child to pass through the birth canal).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.