You can actually sharpen the blades on a pencil sharpener by wrapping your pencils in aluminum foil before inserting them.
Blue light effect
Blue light makes people alert at night, which could be useful to people who work at night.
More Miscellaneous Facts
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.