There are facts that we know without fail. They are a part of our folklore and reflected in our folk-psychology and language. We thus believe that a bat is blind and, when we emphasize the totality of our ocular affliction, we compare ourselves to it. Yet that a bat is blind is questionable, because its eyes serve as sensory receptors in echolocation. Without inviting you to stop using idioms, we offer you corrected information about the world.
Contrary to their name and our intuitive understanding of this natural phenomenon, black holes are not holes in any sense of this word. They are dense objects with compact mass, geometrically defined space-time regions that exhibit such strong gravitational effects that neither particles nor even light can escape from inside them.
Somehow we came to believe that to wake up sleepwalking people is harmful to their health. If we disturb their activities and wake them up, they will harm themselves irrevocably. These speculations are no more than speculations. Sleepwalking is just a sleep disorder, not a mental disease; neither are sleepwalkers possessed of the devil. Sleepwalkers arise from the slow wave sleep stage in a state of low consciousness and perform activities that are performed during a state of full consciousness. To wake when from sleepwalking will be as harmless as to wake anybody from sleep.
We learned somewhere that our tongue is divided in four sections, each of which has receptors that live inside taste buds responsible for sensing different aspects of food. Different receptors pick up different tastes. The tip of our tongue senses food sweetness, its middle feels food's temperature, etc. This is only a popular misconception. Tongue is not divided into parts. We have taste receptors everywhere inside our mouth. All of them pick up tastes and send these signals via neurons to the brain, giving us the sensation of taste, temperature, and pain.
It makes you look knowledgeable, if you assert that bananas grow on trees. Yet, strictly speaking, bananas do not grow on any tree. Banana is a flowering plant. Banana plants are normally tall and fairly sturdy, and are often mistaken for trees, but what appears to be a trunk is actually a "false stem" or pseudo stem.
5.Horned Viking Helmet
We know roughly who were Vikings. We learned that the Viking age in European history was about AD 700 to 1100. The Vikings came from three countries of Scandinavia: Denmark, Norway and Sweden. The name 'Viking' comes from Old Norse and means 'a pirate raid'. People who went off raiding in ships were said to be "going viking." When we visualize Vikings, we invariably imagine them wearing horned helmets. Yet in truth, Vikings wore no such head wear. They did not exist then but were designed in the 19th century for characters of Wagner's Opera.
6.We Evolved From Chimpanzee
It is true that a part of our world's population considers this statement sacrilegious and ridiculous. This part of people will unequivocally state that we are made by God. But even those people who deny the existence of God and believe in evolutionary processes are wrong, if they believe that we evolved from existing chimps and that the latter were just less fortunate than us to advance as we did. In reality, such species of apes as chimpanzee and bonobo are our relative species rather than our ancestors. Our common ancestor lived 7 million years ago.
We often heard that our brain is divided into two hemispheres, the right and left. The right part of the brain is a creative brain and is responsible for rhythm, spatial awareness, color, imagination, daydreaming, holistic awareness, and dimensions. The left hemisphere is a logical brain responsible for words, logic, numbers, analysis, list, linearity, and sequence. Now, this division is fanciful. The right and left hemispheres are approximate mirror images of each other. Each hemisphere is conventionally divided into four lobes. Both hemispheres can perform each other's functions.