ABSTRACT
Humans have evolved in close contact with Nature, and the rst food that Nature provided for man was milk. Throughout most of the evolution of the human history, from 200,000 years BP (before present) up to 15,000 BP, the sole source of milk was from mother to newborn baby. In early times, when Nature failed to give milk to the child with a lactating mother, the baby either suckled another mother or died [1].
