Ergebnis für "Evolution!" in Humangeographie

Having worked on numerous high-profile genetic investigations, including one focused on the famed Iceman of the Italian Alps, Bryan Sykes has become a premier authority on human genetics. In DNA USA, Sykes examines the unique fabric of the U.S. population - the people of one of the world’s most genetically variegated countries. His fascinating discoveries offer new insights into the biological profile of the great melting pot.

Human history mirrors the history of climate change. Human origins, for example, can be traced to five million years ago when the climate of East Africa became progressively hotter and drier. This caused the lush tropical jungles to disappear and be replaced by arid plains and savannahs. Our pre-human ancestors learned to exploit those new ecosystems by gathering the seed-bearing grasses, nuts, and tubers that thrived in these semi-arid conditions. Also, by foraging in the heat of the day, proto-humans could minimize unwelcome contact with nocturnal predators.