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Biogeography (the distribution of life forms over geographical areas) is another piece of evidence that supports evolution. If evolution were in fact the case, you would generally expect species that are closely related to be found near each other unless there were a good reason for them not to be, such as great mobility (for example, sea animals, birds, and animals distributed by humans, or, over longer time frames, plate tectonics).
In general, the biogeographic distribution of species supports evolution. Species are distributed around the globe largely in relation to their relationships to one another, with some understood exceptions. For example, marsupials are found almost exclusively in Australia, whereas placental mammals (not counting those brought there by humans) are very rare in Australia. The few exceptions are explainable by continental drift (remember that South America, Australia and Antarctica were once part of one continent).
There are many other examples of such expected biogeographical distributions. If life forms arose independently, it would make as much if not more sense for them to exist wherever an environment could support them, as opposed to being distributed according to their apparent relationship to other life forms. Biogeographical distribution according to biological relationship makes perfect sense if organisms evolved.
(A bibliographic list of sources and recommendations for further reading will be coming soon...)
This FAQ information provided by Lance F..
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