I retire from the debate and never post on this topic again if you can show me a professional, juried publication in which a respected scientist has predicted such an event or suggested such and event has happened in the history of the earth. This may sound unfair, but I have to limit this offer to publications from the past hundred years. I rather doubt that you could find such a statement in the writings of Darwin. Only a complete idiot would suggest that such a thing was part of evolutionary theory.