- A 15th anniversary is called a quindecennial.
- The 'black box' that houses an airplanes voice recorder is actually orange so it can be more easily detected amid the debris of a plane crash.
- Deers don't like hay.
- Sound travels 15 times faster through steel than air.
- The word 'uncopyrightable' is the is the only 15 letter word that can be spelled without repeating any letter.
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