One of the main differences between skin rashes and hives is the way that they appear on the skin. The raised, red bumps that are hives are eruptions on the surface of the skin. Rashes are a skin discoloration and will only appear slightly raised from the skinâs surface.
Alfred Russel Wallace, codeveloper of the theory of evolution. The image is modified from http://www.prs.k12.nj.us/schools/phs/science_Dept/APBio/Natural_Selection.html. In 1858, Charles Darwin received a letter from Wallace, in which Darwin's as-yet-unpublished theory of evolution and adaptation was precisely detailed.
Although it was known that species evolved, there was no â¦real universally accepted reason why they did so.  Charles Darwin's contribution was combining competition for resources, avoidance of predators, and the ability to attract a mate for the purpose of reproduction into a single theory called Natural Selection.