- 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.
- Bees can see ultraviolet light.
- A pigeon's feathers are heavier than its bones.
- The dishwasher was invented in 1889.
- Wheat is the world's most widely grown plant.
- The Basenji is a dog that yodels instead of barking.
- Both green and black tea come from leaves of the same tree.
- The Dead Sea is actually an inland lake.
- The tea bag was invented in 1908.
- A bolt of lightning can reach temperatures hotter than the sun.
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