Peterson Book free essay sample

Ever since humans began shaping the world around them, this process has often been the result of human action. But in the long era before humans, the increasing dissimilarity resulted, in the opinion of most scientists, from  the process of natural selection. Small variations within individuals in one species allowed them to acquire more food and better living conditions and made them more successful in breeding, thus passing their genetic material to the next generation. When a number of individuals within a species became distinct enough that they could no longer interbreed successfully with others, they became a new species. Species also become extinct, particularly during periods of mass extinctions such as the one that killed the dinosaurs about 65 million years ago. Natural processes of species formation and extinction continue, although today changes in the biosphere — the living matter in the world — result far more from human action than from natural selection. We will write a custom essay sample on Peterson Book or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Archaeologists at a Dig These researchers at a Native American site in the Boise National Forest in Idaho follow careful procedures to remove objects from the soil and note their location. The rituals and medicines through which shamans and healers operated were often closely guarded secrets, but they were passed orally from one spiritually adept individual to another, so that gradually a body of   knowledge about the medicinal properties of local plants and other natural materials was built up. By observing natural phenomena and testing materials for their usable qualities, Paleolithic people began to invent what would later be called science. The Development of Agriculture in the Neolithic Era, ca. 9000 B. C. E. How did plant and animal domestication develop, and what effects did it have on human  society? Foraging remained the basic way of life for most of human history, and for groups living in extreme environments, such as tundras or deserts, it was the only possible way to survive. In a few especially fertile areas, however, the natural environment provided enough ?†¢