Abstract
Some of the most extreme environments in which humans are found include the cold, barren climates of the Arctic, the hot, humid regions of tropical forests, and life at high altitude, whether in the Himalayas or the Andes, where the amount of oxygen in the air is reduced. Humans have met these challenges through technological innovation. However, we will look at the biological adaptations, including genetic changes, that have enabled humans to survive in extreme and inhospitable environmental conditions.
