Our ancestors did it with small virtually imperceptible changes over tens of thousands of generations. We did not suddenly pop out of an ape ancestor's womb as a modern human. As has been explained many many times on this forum the speciation we see in cases such as the frog is exactly what the ToE predicts we would see.
And once again, the frog is a frog. I am really getting bored with these same old arguments. Maybe we could argue about whether Muslims should be allowed into the U.S.