Evolution is a fascinating process, it affects all living things,
humans began to evolve several millions years ago, Homo sapiens
appear in the fourth stage of human evolution, modern humans
acquired culture, religion, philosophical, thought, analytical
thinking, technological knowledge, science and language.
Humankind has faced since the beginning several challenges, from
the necessity to obtain food, hazard environmental conditions,
dangers and competition with other species around them;
therefore, humankind has faced several challenges to preserve;
including health issues, illness and disease.