[jpsb]

The main mechanism is natural selection

This I am not buying, I also do not buy that evolution is gradual or on going processes. I think something very big happens and throws life into a crisis and then raped evolution occurs until things settle down again.

[jwalsh07]

You're a smart guy. Look at the evidence and draw your own conclusions. Adios.

[jennyp]

The main mechanism is natural selection

This I am not buying, I also do not buy that evolution is gradual or on going processes. I think something very big happens and throws life into a crisis and then raped evolution occurs until things settle down again.

The "punctuation of the equilibrium" that creates a new species happens quickly as viewed by a paleontologist. But in real time it's still dozens or hundreds of generations long.

I can't think of any single speciation in the fossil record where mainstream scientists think that the transition to the new species involved a great leap.