Re: Battlestar Galactica Season 4
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Originally Posted by Paul_Sjordal
Back to the topic, mitochondrial DNA always comes from the mother, never from the father, so this would mean that the mitochondrial DNA of humanity as we know it is 100% cylon, technically making Athena the "Mitochondrial Eve".
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I guess it ultimately depends on whether Cylons have DNA to even pass on, or if they simply mimic it in virtually every way (but not 100%). In which case, the Cylon "programming," akin to human DNA, is mere computer data until mixed with human DNA (in this case, from Helo), and the offspring has the data reprogrammed into DNA. It raises questions like "if Cylons don't have DNA, is there 'crossing over' in the reproduction?" In the end, it's splitting hairs, since there will never really be a definitive canon answer. It's fun to debate, though

With reference to the Bering Land Bridge, the actual date is of migration to North America, is, of course, debated among scholars. As Jared Diamond points out (in "Guns, Germs, and Steel" - a remarkable work), as soon as someone finds a an "earliest X," the race is on to prove X false. Currently, research (mostly around so-called Clovis sites) place the earliest occupation of Siberia (on the Asia side of the Berring Strait) at about 20,000 years ago, and the oldest *unquestioned* human remains in Alaska at 14,000 years ago (12,000 BC). It's unclear at this time when during that period migration actually took place, though most scholars tend to just cite ~14,000 for conversation's sake. Complicating things further is that notion that travel via boat has been found in Indonesia, dating about 40,000 years ago, which has as its implications the small chance that migration to North America occured in a similar fashion (very small, mind you), stretching the window to between 35,000 and 14,000 years ago.
It's all quite interesting stuff, and I wish my work at University allowed me more than just a passing fascination. "Guns, Germs, and Steel" is well-worth a read, if you get the chance.