A scientist sat beside a little girl on a plane. He wanted to start a conversation.

He said: » I hear flights shorten if you talk with other passangers…«

The little girl replied: »OK, what do you want to talk about?«

The scientist was being a bit sarcastic: »Why don’t we talk about nuclear physics?«

The girl said: »Can I ask you somethig first? A goat, a cow and a horse all eat grass, yet a goat poos small balls, a cow poos flat paddies and a horse poos plum size droppings. Why is that?«

The scientist replies: »I have no idea!«

To which the girl: »And you want to talk about nuclear physics? You don’t know shit!«