Are there any observable incidents of one species of animal turning into another species?

FAIL!! Have you even read anything about evolution? Species don't just magically change into something completely different. Evolution involves organisms gradually changing over hundreds of thousands of years; and changing into a SIMILAR organism (i.e., some monkeys evolved into humans) And why do we believe this? Because it's backed by significant scientific evidence. The Jesus theory? That's based entirely on some random guy walking around, telling people that he is the son of a magic cloud man, and gaining a following of idiots because he did this.