The national anthem of Spain has no words.
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More fun and useless facts:
- Human saliva contains a painkiller call opiorphin that is six time more powerful than morphine
- As soon as tiger shark embryos develop teeth, they attack and eat each other in the womb
- A cat’s jaw cannot move sideways
- 1 out of 2500 babies is born with a tooth
- 12% of all Coca-Cola in America is drunk during breakfast