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Politics : View from the Center and Left -- Ignore unavailable to you. Want to Upgrade?

To: Steve Lokness who wrote (239560)	12/7/2013 11:29:38 PM
From: neolib	Read Replies (2) \| Respond to of 541933

Species is a very artificial concept. The real world is a bit more complex. Many species which are classified as such can in fact breed with closely related ones, its just that they don't in general. Look at ring species for an example of how things get murky. And no, your views about them interbreed way back is not what is being claimed. They actually can make estimates of when these things happened vs when the "species" diverged from a common ancestor. The interbreeding was much more recent than the divergence. But more to the point, the mtDNA is showing that very significant replacement happened even within say "modern" humans, i.e. europeans of 10K y/a show an infusion of new mtDNA vs older populations. I don't understand how they do all the stats to arrive at this, but its a very interesting field.