Three blondes were walking through the forest when they came upon a set of tracks.
The first blonde said, "Those are deer tracks." The second blonde said, "No, those are elk tracks." The third blonde said, "You're both wrong, those are moose tracks." The blondes were still arguing when the train hit them.
A blonde was playing Trivial Pursuit one night. It was her turn. She rolled the dice and she landed on Science & Nature. Her question was, "If you are in a vacuum and someone calls your name, can you hear it?"
She thought for a time and then asked, "Is it on or off?"