Someguy, I have the solution to your problem.
Here is an explanation of evolution posted here that was
so good, I saved it for later use. It has no big words and if fits on one page.
Once upon a time there was a buch of little daddy animals and a buch of little mummy animals. Like most mummies and daddies, they had little baby animals.
After a while, some of the babies were able to grow up and be mummies and daddies of their own because they lived long enough to have babies. But the sad little ones who had something wrong with them went to heaven because they were too slow to run away from the tigers.
After a long time because only the bestest and fastest animals lived long enough to have babies their babies got faster and faster with each new bunch of kids, the tigers were too slow to catch any of the little animals and because the tigers did not have enough to eat the baby tigers started going to heaven before they could grow up and have babies of their own!
But - and here is the really smart bit! - some of the baby tigers were fast enough to catch the little animals and they all grew up to be mummies and daddies. So the tigers and the little animals all got to be very fast runners.
Now these tigers lived a long way away from all the other tigers in the Jungle in India and because they got to be faster runners, every time they had a new gen-er-ation (remember that word Mike? - it means each new batch of babies born; like you and your brother is one gen-er-ation, your Mum and Dad is another and your Gran and Grandad is another one again), each new gen-er-ation looked a bit different until after a lot of new gen-er-ations we had big strong tigers in India ('cos they did not have to chase little fast animals but big strong ones) and fast tigers in Africa.
Because they looked different we call the African ones Leopards.
If a leopard and a tiger were to meet and get married and want to have babies, because they are so different now it would be very very hard and probably the baby would not grow in the mummy's tummy like when your little brother was born.
It would be like on Star Trek if Deanna and Worf got married and wanted to have babies, it would probably not happen.
That is how e-vo-lu-tion works Mike.
