A Child's Eye View Of The World

One of the main causes of dust is janitors.

Blood circulates through the body by flowing down  one leg and up the other.

Genetics explains why you look like your father, and  if you don't, why you should.

There is a tremendous weight pushing down on the center of the earth because so many people are stomping around  there these days.

The word "trousers" is an uncommon noun because it is singular at the top and plural at the bottom.

There are 26 vitamins in all, but some of the letters are yet to be discovered.

I'm not sure how clouds are formed, but clouds know how to do it, and that's the important thing.

The cause of perfume disappearing is evaporation. 
 Evaporation gets blamed for a lot of things people forget to put the top on.