(July 29, 2014 at 8:15 am)Thumpalumpacus Wrote: What mechanism do you assert is in place which stops variations from continuing on building up until a new species exists?
eta: with apologies to Bibliophagus, I just caught up to his identical question earlier in this thread.
No worries mate! I think you phrased it a lot better and I hope you get an answer.