1. The cracking sound made by knuckles, necks, backs, and other joints when they’re cracked is the sound of bubbles popping in the joints’ fluid. Is it harmful? Not terribly. But cracking a joint too often can hurt the cords, called ligaments, that surround the joint

2. Sweat doesn’t smell bad. A stinky “body odour” is caused when the skin bacteria feed on sweat. Their waste products are what smell bad

3. Just one drop of blood contains about 10,000 while blood cells and 250,000 platelets

4. You’re used to seeing bugs in your garden, but how about on your plate? Nutritious, edible insects including grasshoppers, beetles, wasps, worms, cicadas, and caterpillars are paced with vitamins and minerals and are eaten by people around the globe! Visiting China or Thailand? Stop for a deep-fried cicada on a stick! Next stop the Netherlands? Grab a grasshopper spring roll or burger (with meal Worms)

5. Eye colour Heterochromia is a condition in which people have different colour eyes. It’s rare in humans (actor Kiefer Sutherland has heterochromia), but common in dogs

6. The Brain is a very wrinkly organ! If you spread it out, your brain would be about the size of a pillowcase. By the time you are six years old, your brain is already 90 percent of the size it will be when you are an adult


7.The liver has an amazing ability to grow back if part of it is removed due to injury, disease, or surgery. It will even grow to be just the right size for the body it’s in.

8. Like dead skin cells, your hair and nails are made of keratin. Keratin forms tough body parts in other animals, too. It’s found in wool, fur, feathers, claws, beaks, hooves, horns, porcupine quills, and turtle shells

9. About 10,000 human cells can fit on the head of a pin

10. Your salivary glands produce two to six cups of (0.5-1.5 litres) of saliva a day. Six cups of saliva would come close to filling a big, two-litre (67.6) ounce soda bottle!

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