Why is the sky blue?
Stupid: When you were born a kid colored the sky in blue with a crayon. We can't figure a way to remove it yet..
Internet: NOPE its actually because of sunlight which is not yellow. It's actually bunch of different colors mixed together, and blue happens to bounce around more then others like red or green.
Stupid: Pigeons blue Pigeons everywhere... so many of them high in the sky they turned it BLUE.