- Arachibutyrophobia is fear of peanut butter sticking to the roof of your mouth.
- The number Pi (the ratio of the circumference to the diameter of a circle) can't be expressed as a fraction, making it an irrational number. It never repeats and never ends when written as a decimal..
- Tigers have striped skin as well as fur.
- Hummingbirds are the only bird that can fly backwards.
- Human thigh bones are stronger than concrete.
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