Ever been any natural extinctions:Was Selective preservation of species

[Paul Cherubini]

Neil Jones wrote:

> It is frequently cited that extinction is a natural process. (This is 
> usually done by the opponents of conservation.) However, in 
> reality surely the level of natural extinctions is utterly minuscule 
> when compared to those which are "man-made".

I guess that depends on the time frame we are talking about.