I don't believe it ever happened. But if it did, then I'm with you Sal.
There is a species of lizard that is all female and impregnate themselves. This was once a natural selection method that many species used, today there are only a few. It just wasn't as successful as the male/female method. Adaptation to changing environment, using this method is much slower as there is very little difference in the DNA between Parent and offspring this way ... hence positive mutations occur much less often, leading to the decline of these species in rapidly changing environments.
It is mainly found in desert and very arid areas where there is little environmental change.
Good one Sal ... greg
