496. Angry people produce more unique ideas faster than people in any other type of emotional state, according to a study.

497. You get a song stuck in your head because your brain interprets the song as an unfinished task, especially if you only remember one part.

498. Once you begin to dislike someone, everything they do tends to annoy you.

499. Math anxiety is a psychological disorder which causes stress and anxiety when doing math problems.

500. To understand a pun, your brain's right and left hemispheres have to work together, due to the unique structure of the joke.