The human brain has an estimated storage capacity of 2.5 petabytes—enough to hold 3 million hours of television.

When you look at someone you love, your pupils dilate. Surprisingly, they also dilate when you look at someone you hate — both emotions trigger the same arousal response.

The average sexual encounter burns about 100 calories, roughly equivalent to walking for 20 minutes.

Cherophobia is the fear of happiness — sufferers actively avoid joyful experiences because they believe something bad will follow.