Based on an actual conversation.

Scene: The family kitchen. A Tuesday evening, as dinner is being prepared:

FOOL:

So, I hear on the news that they've found evidence that there was water on Mars.

The scientists say that water is indicated by the presence of Hydrogen Peroxide in the atmosphere.

But maybe that just means there were blondes on Mars. . . ?

HIS LADY WIFE:

So much for the search for intelligent life. . . .

Ba-dum-pum!