[Oberon]

Look..."does not breed at all" doesn't mean "can't breed at all." If you can get past that point, you can't get the diversity of species we see in nature. At some point that line has to be crossed, or macro-evolution falls apart.

I'm willing to be agnostic on the matter, but to say that macroevolution is settled science is disingenuous.

[Dante Alighieri]

The only line is time. The Earth is billions of years old. What's your point? Possibly, Theobald's article might be instructive.