Charles Darwin's On the Origin of Species was published in 1859. In it, Darwin described the idea that animals evolved through variation and natural selection of those fittest to endure in particular environments. In 1871 Darwin applied this theory directly to human beings in The Descent of Man. Be...

Evolution and Genetic Engineering Activity 1: Why is AIDS so difficult to cure? How does the AIDS virus attack the body? â In 1979, the first reported AIDS case occurred in New York, and by mid-June 1981, unusual immune system failure among gay men was surfacing in the United States. The...

In his most famous book On the Origin of Species, Darwin included four major arguments: that new species appear; that these new species have evolved from older species; that the evolution of species is the result of natural selection; and "that natural selection depends upon variations and the mai...

Social Darwinism in American History Toward the end of the 19th century, the United States entered a period of growth and industrialisation. An abundance of natural recourses, cheap labour supply, and a self-sufficient food supply contributed to the industrialisation of the United States. T...

Few scientists have been as influential or as controversial as Charles Darwin has. He is considered by many to be the father of the theory of evolution. He knew that there was a great deal of variation among members of a species and that some of these variation made individuals more fit to survive...

Natural Selection - process by whch populations become adapted to the environment. The fitness of an individual is measured by how well its offspring reproduce - i.e. how many offspring that survive and reproduce does an individual produce Charles Darwin studdied and closly watched peppered...

B.F. Skinner's OPERANT BEHAVIOURISM and SELECTION BY CONSEQUENCES ~ a critical assessment ~ "Reproduction was itself a first consequence, and it led, through natural selection, to the evolution of cells, organs, and organisms which reproduced themselves under increasingly diverse ...