Showing posts with label misconceptions. Show all posts
Showing posts with label misconceptions. Show all posts

10 common misconceptions


1. Bluetooth is NOT named so because it simply looks like a … blue tooth. Not even close!
This technology was named after King Harald Bluetooth who united the dissonant Danish tribes into a single kingdom. Jim Kardach proposed this name because his system would connect mobile phones with computers as well as with each other, similar to what King Bluetooth had done in the tenth century. The logo
Bluetooth.svg is a blend of Harald Bluetooth’s initials H () and B ().

2. ‘Google’ is a misspelling of ‘Googol’ a number written as the digit one followed by a hundred zeros. Originally US mathematician Edward Kasner wanted to name this number and his nine-year-old nephew Milton Sirotta suggested ‘googol’. The name appealed to Kasner who used it in his book Mathematics and the Imagination in 1940. Then in 1997, Larry Page and Sergey Brin changed the name of their search engine from ‘Backrub’ to ‘Google’ to signify the large quantities of information this engine would provide.
 

3. Big Ben is NOT that world famous tower in London. This tower is called the ‘Clock Tower’, or officially ‘Elizabeth Tower’ since 2012. Big Ben is just the bell inside the tower, probably named after Sir Benjamin Hall, a British civil engineer and politician.

4. We believe that red enrages bulls and so matadors always have red capes. Bulls do not see red because cattle are dichromats. They charge at capes as they perceive a movement while matadors stand very still.

5. Another common misconception is that the Great Wall is the only man-made object visible from the moon. However, the wall is barely visible from low orbit (180,000 miles) under a specific set of weather and lighting conditions. The moon is roughly 237,000 miles.

6. It is widely believed that citrus fruits (oranges, tangerines, lemons, grapefruit) are rich in vitamin C. See how much vitamin C in 100 grams of each:
orange 53.2 mg
tangerine 26.7 mg
lemon 53 mg
grapefruit 33.3 mg
Do you know that 100 grams of guava contains 228.3 mg of vitamin C? This is more than the previous four combined.
Other foods are also rich in vitamin C such as chili (144 mg), parsley (133 mg), kale (120 mg) and golden kiwifruit (105.4 mg).
Next time you catch a cold, use real weapons.

7. Ostriches do NOT bury their heads in sand when they are scared. They simply swallow sand and pebbles to help grind up food in their stomachs. This means they have to bend down and briefly stick their heads in the earth to collect the pebbles.



8. Incense could be more harmful than cigarette smoke and might need to carry a health warning, just like tobacco. So there must be greater awareness and management of the health risks associated with burning incense in indoor environments.



9. Back in the 80s and 90s our history teachers used to boast that the pyramids are exclusive to Egypt. Check the Nubian pyramids in Sudan, Nsude pyramids in Nigeria, the Pyramids of Guimar in Spain, the Pyramid of Cestius in Italy, Mexico, China …


10. The word ‘Pepsi’ has been circulated as the acronym of ‘Pay Every Penny Save Israel’ which is not true. Pepsi is a derivative of pepsin, an enzyme in the stomach that breaks down protein. Look up ‘dyspepsia’: a pain caused by difficulty in digesting food. So the word ‘Pepsi’ connotes easy digestion.   


هذا النصيحة كذب وإساءة متعمدة لسُنَّة النبي صلى الله عليه وسلم ورد النهي عن شرب الماء واقفا فى أحاديث صحيحة، وثبت أيضا أن النبي صلى الله ع...