Evolution is a phenomenon.
A phenomenon is an occurrence, a circumstance, or a fact that is perceptible by the senses (Source: http://dictionary.reference.com/browse/phenomenon, accessed Sept. 17, 2012).
What humans perceive is that populations of living organisms have changed and are changing over time.
“The theory of evolution” is shorthand for the set of explanations that seek to explain the phenomenon of evolution. Sometimes “the theory of evolution” is also called “evolution,” and this can be confusing.
Really, the theory is “the theory of evolution BY natural selection, genetic drift, gene flow and mutation.” In science, a theory is a set of well-tested hypotheses and repeatable experiments that together provide an explanation for a phenomenon.
Again, evolution is the phenomenon.
Scientists have demonstrated that the processes, or mechanisms, of natural selection, genetic drift, gene flow and mutation, together explain WHY and HOW the phenomenon of evolution occurs.
If you want to be…
View original post 159 more words