- The human eye can detect more shades of green that any other colour.
- Humans are the only primates that don't have pigment in the palms of their hands.
- The largest island in the Mediterranean sea is Sicily.
- Mosquitoes prefer children to adults and blondes to brunettes.
- Dragonflies have 6 legs but can't walk.
- 1 nautical knot equates to 1.852 Kph (1.150 mph).
- Swiss mathematician Leonhard Euler was probably the most influential mathematician of the 18th century, making discoveries in graph theory and introducing many modern mathematical words and notations among other things.
- Greyhounds can see better than any other dog breed.
- The skeleton of an African elephant accounts for about 15% of its body weight.
- Sound travels about 4 times faster in water than in air.
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