- the greyhound is the fastest dog and can reach speeds of up to 72kph (45mph)
- the hamburger was invented in 1900
- the hardest substance in the human body is enamel
- the Hawaiian alphabet has 12 letters
- the hottest chilli in the world is the habanero
- the human body contains 96,000km(59,650miles) of blood vessels
- the human body creates 2,500,000 new red blood cells every second
- the human body has over 600 muscles (40% of the body’s weight)
- the human body of a 70 kg person contains 0.2mg of gold
- the human eye blinks over 4,200,000 times a year
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