The Theory of Evolution is a valid theory (idea)

There are many biological reasons, also, why the Theory of Evolution is valid. I will attempt to cover the current evidence biologists use to support the theory, adding my own attempt to stand up for sanity. As for bol's mention of religion; many religions have come to accept that creation is not a valid theory.

Biologically, there are 6 major areas that support Evolution: Fossil Record, Embryology, Comparitive Anatomy, Study of Intermediate Forms, Biogeography and Molecular Biology. These are discussed briefly below.

1. Fossil record
   • Evidence of past life on Earth
   • Evidence of evolutionary changes to organisms changing environment


2. Embryology
   • During the embryonic development organisms often develop structures that resemble those seen in ancestral adults.
     e.g. Human embryos with gills, gills are lost later in development


3. Comparitive Anatomy
   • Organisms may share basic structural forms that suggests common ancestry (Homologolous structure).
     e.g. Forelimb structures


4. Study of Intermediate Forms
   • Transitional forms ("links")
     e.g. Archaeopteryx Lithographica - Intermediate form between dinosaurs and birds (first with feathers)


5. Biogeography
   (the study of the distribution of organisms)
   • Evidence of modern animals being decended from ancestors in the same area.


6. Molecular Biology
   • DNA Structures
   • Amino acid sequences in proteins of similar functions.

As with bol's write-up, these facts do not prove the theory of evolution without doubt, but they do show it to be a very valid theory.

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This is NOT a cut-and-paste write-up.