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• How many aerospace engineers -- does it take to change a light bulb?
  None. It doesn't take a rocket scientist, you know....
• Researcher: Why, they're all a bunch of blue-collar slobs!
  Scientist: People, that's who we need for our next astronaut....
• Now you know why the Cheshire Cat is smiling.
• I think a good scene in a movie would be where one scientist tells another scientist, "You know what will save the world?
  You're holding it in your hand." And the other scientist looks, and in his hand are peanuts....
• This is the tomorrow you worried about yesterday. And now you know why.
• I don't understand", said the scientist, "why you lemmings all rush to the sea and drown yourselves".
  How curious", said the lemming, "The one thing I don't understand is why you human beings don't....
• I don't understand," said the scientist, "why you lemmings all rush down to the sea and drown yourselves.
  "How curious," said the lemming. "The one thing I don't understand is why you human beings don't....
• You will never really know why the English drink so much tea until you try their coffee.
  Then, you will know!...
• Beat your son every day; you may not know why, but he will.