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Facts 11 - 20

11. The human body produces millions of new cells every day!
12. A group of butterflies is called a 'kaleidoscope'!
13. The first computer bug was an actual bug - a moth stuck in a computer!
14. A group of penguins is called a 'rookery' or a 'waddle' – not a 'colony' as commonly believed!
15. The human heart beats around 100,000 times per day on average!
16. A group of dolphins is called a 'pod'!
17. The human body contains about 3-4 grams of iron, which is not enough to make a 3-inch nail!
18. A group of cats is called a 'clowder'!
19. The human brain typically accounts for about 20% of the body's resting metabolic rate!
20. A group of elephants is called a 'herd'!
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