Something is different -- the species. And that's what we're talking about.
The term species is very loosely used by evolutionists. Care to define it?
Evolution is not about species anyways. It is about new added characteristics to a species's genome. Otherwise man could have never evolved from an amoeba or a bacterium or some such simple creature as evolutionists constantly claim to have occurred but are totally unable to give any proof of.
BTW - note that the definition has to include proof for completely dead species also since evolutionists also love to classify things by a few bones found here and there.