[Protagoras]

Ok, but how many new characteristics before we call it a new animal?

How can you tell one animal from another? DNA? Could that be the answer?

[pnome]

How can you tell the difference between me, and a silver-back gorilla?

Our DNA is very very close, but we look very very different. Or do we? I wonder how different we look to say, a dog? We smell different for sure. But then, I'm sure you smell different than me.

The gorilla and I both have hair, him more than me. (though I've seen some hairy guys in my time. We both have one head, two arms, two legs, and some dangelies between our legs.

However, what is really a slight difference in brain to body mass ratio seems, in this case, to make ALL the difference.

A slight difference in characteristics, and I'm a silver-back (a small one anyway).