How many of the things we take for scientifically true are actually wrong? And how many of which we are then to be invented for real? In LiveScience have a complete list of this type of scientific myths. I bring the 10 that I considered most interesting.
1. The water falls in the opposite direction in the Southern Hemisphere due to the rotation of the Earth
Earth's rotation is too weak to affect the direction in which water rotates as it falls on a drain. Anyone can check this easily by just opening the taps for several bathrooms. In every place look like swirling water forms one side or the other depending only on the shape of the basin, not the hemisphere where you are.
2. Humans use only 10% of brain
This myth leads difundidísimo Nearly a century spinning even in the media. Fortunately it is not true. The imaging research techniques such as Nuclear Magnetic Resonance have shown that humans make good use of the cerebral cortex even when sleeping (en). [More information ].
3. A chicken can live without a head
True, and also for some time. A rooster can survive without a head because his brain stem often remains intact after almost cut his throat, can still be controlled by himself most of his motor skills. The famous and robust chicken Mike got to live for 18 months .
4. In space there is seriousness
The blame for this common misconception is the image we have of astronauts floating inside a spacecraft. When an object (a satellite, a shuttle) is in orbit is weightless state (since gravity does act), but in a state of freefall. This means that the object is actually falling toward Earth, but as its tangential velocity is so high, the soil is "curve" faster, and therefore the object never touches the ground. Gravity is everywhere, even in space. Nor is it true that space is a vacuum. There are all kinds of atoms out there, but often very distant. [ complete information ]
5. A coin thrown from the top of a building could kill a person
A small coin, such as 5 cents, is not exactly the most aerodynamic weapon that exists. Because of its shape and wind friction only get achieve the necessary speed (even being thrown from the top of the Empire State Building to 381 meters) for just sting the unfortunate pedestrian.
6. In the adult brain does not generate new cells
has always been accepted that every human born with a certain number of neurons that trailed along in life without possibility of replacement. It is true that most (and most important) of brain development occurs during childhood, but that does not mean that everything is downhill from then. Studies have shown that even the elderly are able to generate new brain cells for, and they are working properly. [More information ].
7. Men think about sex every seven seconds
Men, in terms of evolution, are genetically programmed to reproduce, but there is no one scientific method to measure how long the day is spent daydreaming. Fortunately for global productivity, and those seven seconds seem just a gross exaggeration, right?
8. A lightning never strikes twice in the same place
lightning In fact they have their place "favorite", especially in high-altitude sites. For example the Empire State Building as atman about 25 times a year. Benjamin Franklin understood the concept long ago. He climbed a metal bar on the roof of his home, which joined to ground by conductor cable. Had just invented the lightning rod.
9. Chicken soup cure the common cold
Perhaps using the word "cure" is an exaggeration, but believes that science mothers around the world do well when forcing their children to make soup broth. Studies have found that the soup contains anti-inflammatory properties that help reduce congestion.
10. Hair and fingernails continue to grow after death
Although hair and nails seem to continue to grow after death, this is merely a morbid illusion. In death the human body dehydrates severely, retracting enough skin to expose the nails and hair more than usual.
0 comments:
Post a Comment