I don't understand...are those twin guys called Zach and Cody actually 'identical' like scientifically identical? They look nothing alike to me:

The one on the left has a big chubby-ish head and the other one has a slender head...
And then Jedward, are they identical twins:

The one on the left has a more jutting out eye brow bone thingy, and his forehead isn't as big as the other one....Well, he just looks more serious to me, I can't totally pick it out, though...O.o
And then Tia and Tamera Mowry:

The one on the left has smaller or more squinty eyes that kinda look more calm. I mean, of course one has birth marks on her cheek and the other one doesn't, but still. They don't really look that identical.
So I wonder what makes identical twins identical? My best friend looks nothing like her twin even though they're identical, apparently. Well, they DO look alike, but she has a more round face and bigger eyes and a deeper voice, while her sister kinda looks like Avril Lavigne...O.o
But then I know some twins who look NOTHING alike, they're like the exact opposites of eachother. One is a girl, the other is a boy, one is really dumb, the other is a genius, one is really tall, the other is really short...And they don't even look alike. I was surprised to know that they were brother and sister, even more surprised to know that they were twins! O.O But they weren't identical, obviously...XD
Twins are weird...I don't understand them...TT^TT But they're cool all the same! >:D