Tickling Yourself - Not Possible!

"It is not possible to tickle yourself. The cerebellum, a part of the brain, warns the rest of the brain that you are about to tickle yourself. Since your brain knows this, it ignores the resulting sensation." 

Tickling is touching a part of the body, so as to cause involuntary twitching movements or laughter. Such sensations can be pleasurable or exciting, but are sometimes considered highly unpleasant, particularly in the case of relentless heavy tickling.

In 1897 psychologists G. Stanley Hall and Arthur Allin described a "tickle" as two different types of phenomena.[2] The first is a sensation caused by very light movement across the skin. This type of tickle, called knismesis, generally does not produce laughter and is sometimes accompanied by an itching sensation. The second type of tickle is the laughter inducing, "heavy" tickle, produced by repeatedly applying pressure to "ticklish" areas, and is known as gargalesis.

The feather-type of tickle is often elicited by crawling animals and insects, such as spiders, mosquitoes, scorpions or beetles, which may be why it has evolved in many animals. Gargalesis reactions, on the other hand, are thought to be limited to humans and other primates; however, some research has indicated that rats can be tickled as well.

Usage of + & - Symbols

 "The symbols + (addition) and – (subtraction) came into general use in 1489."

Punctuation - 15th Century

"There was no punctuation until the 15th century."

Punctuation is everything in written language other than the actual letters or numbers, including punctuation marks (listed at right), inter-word spaces and indentation. The earliest writing had no capitalization, no spaces and no punctuation marks. Until the 18th century, punctuation was principally an aid to reading aloud; after that time its development was as a mechanism for ensuring that the text made sense when read silently.

The oldest known document that uses punctuation is the Mesha Stele (9th century BC). This employs points between the words and horizontal strokes between the sense section as punctuation.

 

Leonardo da Vinci - Dyslexic

"Leonardo da Vinci was dyslexic, and he often wrote backwards. "

Dyslexia is a learning disability that makes itself manifest primarily as a difficulty with the visual notation of speech or written language, particularly with reading. It suggests that dyslexia results from differences in how the brain processes written and spoken language.

Identified by Oswald Berkhan in 1881, [4] the term 'dyslexia' was later coined in 1887 by Rudolf Berlin [5], an ophthalmologist practicing in Stuttgart, Germany. [6] He used the term to refer to a case of a young boy who had a severe impairment in learning to read and write in spite of showing typical intellectual and physical abilities in all other respects.

Leonardo di ser Piero da Vinci (April 15, 1452 – May 2, 1519) was an Italian polymath, scientist, mathematician, engineer, inventor, anatomist, painter, sculptor,architect, botanist, musician and writer. Leonardo has often been described as the archetype of the renaissance man, a man whose unquenchable curiosity was equaled only by his powers of invention.

Human Body - Bones

"Humans are born with 350 bones in their body, however when a person reaches adulthood they only have 206 bones. This occurs because many of them join together to make a single bone."

A typical adult human skeleton commonly consists of 206, 208 or more bones depending on the method used in counting normal variations. The count of 208 considers thesternum to be made up of three bones instead of one; manubrium, body of sternum (also known as the gladiolus) and xiphoid process. Anatomical variation may also result in the formation of more or fewer bones. More common variations include cervical ribs or an additional lumbar vertebra. Babies are born with around 300 to 350 bones,[citation needed]many of which fuse together during growth.

Children - Growth

"Children grow faster in the springtime than any other season during the year."

Alexander Graham Bell - Telephone

"When Alexander Graham Bell invented the telephone back in 1876, only six phones were sold in the first month."

Alexander Graham Bell (3 March 1847 – 2 August 1922) Alexander Grahwas eminent scientist, inventor, engineer and innovator who is credited with inventing the first practical telephone.

Bell's father, grandfather, and brother had all been associated with work on elocution and speech, and both his mother and wife were deaf, profoundly influencing Bell's life's work.[1] His research on hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first U.S. patent for the telephone in 1876. 

In retrospect, Bell considered his most famous invention an intrusion on his real work as a scientist and refused to have a telephone in his study.[3]Many other inventions marked Bell's later life, including groundbreaking work in hydrofoils and aeronautics. In 1888, Alexander Graham Bell became one of the founding members of the National Geographic Society.

Alexander Bell was born in Edinburgh, Scotland on 3 March 1847.[5] The family home was at 16 South Charlotte Street, Edinburgh, Scotland, and now has a commemorative marker at the doorstep, marking it as Alexander Graham Bell's birthplace.

Cockroaches can live without Head!!!!

"Cockroaches can live 9 days without their heads before they starve to death."

Cockroaches (or simply "roaches") are insects of the order Blattaria. This name derives from the Latin word for "cockroach", Barata.There are about 4,000 species of cockroach, of which 30 species are associated with human habitations and about four species are well known as pests.[1][2]Among the best-known pest species are the American cockroach, Periplaneta americana, which is about 30 millimetres (1.2 in) long, the German cockroach, Blattella germanica, about 15 millimetres (½ in) long, the Asian cockroach, Blattella asahinai, also about 15 millimetres (½ in) in length, and the Oriental cockroach, Blatta orientalis, about 25 millimetres (1 in). Tropicalcockroaches are often much bigger, and extinct cockroach relatives such as the Carboniferous Archimylacris and the Permian Apthoroblattina were several times as large as these.

 

Bird Which can fly backwards!

"Hummingbirds are the only creatures that can fly backwards."

Hummingbirds are birds in the family Trochilidae, and are native to the Americas. They can hover in mid-air by rapidly flapping their wings 12–90 times per second (depending on the species). They can fly backwards, and are the only group of birds able to do so.[1] Their English name derives from the characteristic hum made by their rapid wing beats. They can fly at speeds exceeding 15 m/s (54 km/h; 34 mph).

Hummingbirds feed on the nectar of plants and are important pollinators, especially of deep-throated, tubular flowers. Like bees, they are able to assess the amount of sugar in the nectar they eat; they reject flower types that produce nectar which is less than 10% sugar and prefer those whose sugar content is stronger. Nectar is a poor source of nutrients, so hummingbirds meet their needs for protein, amino acids, vitamins, minerals, etc. by preying on insects andspiders, especially when feeding young.

Hardest Tounge Twister!!!

 The “Sixth Sick Sheik’s Sixth Sheep’s Sick” is the hardest tongue-twister.

Windmills - Rotation

"Windmills always turn counter-clockwise."

A windmill is a machine that is powered by the energy of the wind. It is designed to convert the energy of the wind into more useful forms using rotating blades or sails. The term also refers to the structure it is commonly built on. In much of Europe, windmills served originally to grind grain, though later applications included pumping water and, more recently, generation of electricity.

The first practical windmills were the vertical axle windmills invented in eastern Persia, as recorded by the Persian geographer Estakhri in the 9th century.[1][2] The authenticity of an earlier anecdote of a windmill involving the second caliph Umar (AD 634–644) is questioned on the grounds of being a 10th-century amendment.[3] Made of six to twelve sails covered in reed matting or cloth material, these windmills were used to grind corn or draw up water, and quite different from the later European versions.

Word Spelt - Without repeating its letters!!

The only 15 letter word that can be spelled without repeating its letters “UNCOPYRIGHTABLE”.

Sneeze - Your Heart Stops!

"Every time you sneeze your heart stops a second."

A sneeze (or sternutation) is a semi-autonomous, convulsive expulsion of air from the lungs through the nose and mouth, most commonly caused by foreign particles irritating the nasal mucosa. Sneezing can further be triggered through sudden exposure to bright light, a particularly full stomach, as a result of unexpected, climatic variations in one's environment such as rapid changes in temperature and humidity levels.[citation needed] or as a symptom of viral infection.

The function of sneezing is the expulsion of mucus from the nose containing foreign particles or irritants as well as the cleansing of the entire sinus cavity during colds and other viral infections. During a sneeze the soft palate and uvula depress while the back of the tongue elevates to partially close off the passage to the mouth so that air ejected from the lungs may be expelled through the nose. Because the closing off of the mouth is partial, a considerable amount of this air is usually also expelled from the mouth.

Sneezing typically occurs when foreign particles or sufficient external stimulants pass through the nasal hairs to reach the nasal mucosa. This triggers the release of histamines, which irritate the nerve cells in the nose, resulting in signals being sent to the brain to initiate the sneeze through the trigeminal nerve network. The brain then relates this initial signal, activates the pharyngeal and tracheal muscles and creates a large opening of the nasal and oral cavities, resulting in a powerful release of air and bioparticles. The reason behind the particularly powerful nature of a sneeze is attributed to its involvement of not simply the nose and mouth, but numerous organs of the upper body – it is a reflectory response that involves the muscles of the face, throat, and chest. 

Food that don't go off!!!

"Honey is the only food consumed by humans that don’t go off."

Honey is a sweet fluid produced by honey bees (and some other species)[1] and derived from the nectar of flowers. 

Honey gets its sweetness from the monosaccharides fructose and glucose and has approximately the same relative sweetness as that of granulated sugar (97% of the sweetness of sucrose, a disaccharide).[4][5] Honey has attractive chemical properties for baking, and a distinctive flavor which leads some people to prefer it over sugar and other sweeteners. Most micro-organisms do not grow in honey because of its low water activity of 0.6. 

However, honey frequently[citation needed] contains dormantendospores of the bacterium Clostridium botulinum, which can be dangerous to infants as the endospores can transform into toxin-producing bacteria in the infant's immature intestinal tract, leading to illness and even death (see Potential health hazards below).

The study of pollens and spores in raw honey (melissopalynology) can determine floral sources of honey. Because bees carry an electrostatic charge, and can attract other particles, the same techniques of melissopalynology can be used in area environmental studies of radioactive particles,dust, or particulate pollution. A main effect of bees collecting nectar to make honey is pollination, which is crucial for flowering plants.

Longest word - One Row on Keyboard

" Typewriter is the longest word that can be made only using one row on the keyboard..." 

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause characters to be printed on a medium, usually paper. For much of the 20th century, typewriters were indispensable tools for many professional writers and in business offices. By the end of the 1980s, word processor applications on personal computers had largely replaced the tasks previously accomplished with typewriters. Typewriters, however, remain popular in the developing world and among some niche markets, and for some office tasks.

Lungs - Surface Area

"The surface area of the lungs is roughly the same size as a tennis court."

The lung is the essential respiration organ in air-breathing animals, including most tetrapods, a few fish and a few snails. In mammals and the more complex life forms, the two lungs are located in the chest on either side of the heart. Their principal function is to transport oxygen from the atmosphere into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere. This exchange of gases is accomplished in the mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs called alveoli. 

In order to completely explain the anatomy of the lungs, it is necessary to discuss the passage of air through the mouth to the alveoli. Once air progresses through the mouth or nose, it travels through the oropharynx, nasopharynx, the larynx, the trachea, and a progressively subdividing system of bronchi and bronchioles until it finally reaches the alveoli where the gas exchange of carbon dioxide and oxygen takes place.