posted on Apr, 7 2009 @ 08:09 PM
reply to post by laiguana
Speciation occurs when a single population diverges enough genetically (often as a result of geographic divergence) as to no longer produce viable
offspring. For example, horses and zebras are different species. They can still mate, but the offspring will be sterile. There are four different
known methods of speciation. Allopatric, peripatric, parapatric, and sympatric.
Now... horses and zebras share a very recent common ancestor. Humans and Bonobo Chimpanzees share a much further common ancestor. Even up the scale a
bit - analysis of Neanderthal mtDNA suggests that even they were to far diverged from humanity for successful interbreeding.
So how is it that "Reptiles" and "Insects" - who would undoubtedly share a common ancestor much, much further down the tree of life if they
somehow come from the same biosphere. Some suggest they came from underground on Earth - but reptiles and insects here diverged during the early
Cambrian or pre-Cambrian period. How the hell could they breed with that much division? If they don't come from Earth, or if they came from different
planets from each other, they share NO common ancestor. Just as they would share no common ancestor with us.
How the hell would breeding work?
Genetic manipulation? Perhaps... but if they have that sort of mastery over their genetics, then why would they need to breed -AT ALL-? Why not just
modify their own genetic code right from the get-go? It makes no sense.