- Roosters can't crow if they can't fully extend their necks.
- The golden ratio of approximately 1.618 between two quantities such as lengths often appears in nature (tree branching, uncurling ferns, pine cone arrangements etc) and has been used throughout history to create aesthetically pleasing designs and art works such as Leonardo da Vinci's Mona Lisa..
- It was once illegal to slam your car door in Switzerland.
- Cheetahs can accelerate from 0 to 70 km/h (43mp/h) in 3 seconds.
- The rarest type of diamond is green.
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