Health

Laughter can be dangerously contagious!
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Laughter can be dangerously contagious!


In 1962 in Tanzania, 14 schools had to be shutdown because of an epidemic of contagious laughter!

 



Ocular dominance: Humans have left or right "eyedness"
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Ocular dominance: Humans have left or right “eyedness”


Ocular dominance is somewhat analogous to the laterality of right or left handedness, however the side of the dominant eye and the dominant hand do not always match

 



Sperms were observed for the first time in 1677
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Sperms were observed for the first time in 1677


The observation was made by the Dutch microscope-maker Antonie van Leeuwenhoek, using a sample of his own semen. He reported seeing "animalcules" moving like eels (and was quick to assure his readers that the sample came from an "excess" left over from conjugal relations rather than from masturbation)

 



You may have experienced the Nocebo effect
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You may have experienced the Nocebo effect


In opposition to the Placebo effect, it increases negative symptoms felt by patients who were told about possible negative side effects

 



Koro: the irrational fear of lethal genital shrinkage
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Koro: the irrational fear of lethal genital shrinkage


Koro Syndrome is mostly found among men in China, Japan, and India. It's the obsessive fear that their genitals are shrinking, or retracting into the body, and that when they finally do disappear, they will die

 



Singing regularly may influence the regulation of appetite
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Singing regularly may influence the regulation of appetite


The more one sings, the more the lungs release leptin, a protein manufactured by the body's fat cells. This may in part explain the tendency for opera singers to be overweight

 



Sectoral heterochromia in a cat's eyes
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Sectoral heterochromia in a cat’s eyes


In sectoral heterochromia, the iris contains two completely different colors in the same area. The phenomenon is extremely rare in humans

 



Anhedonia is a particularly sad condition
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Anhedonia is a particularly sad condition


Anhedonia is the inability to experience pleasure from activities usually found enjoyable

 



The human nose can detect 1 trillion different odors!
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The human nose can detect 1 trillion different odors!


A trillion as in a million million (1012). That's a lot of scents!

 



This a root canal treatment prior to fitting a crown
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This a root canal treatment prior to fitting a crown


 



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Swedish researchers have created a biomimetic neuron


Although it is much bigger than a human neuron, it can mimick the functions of a human cell and could be used to replace nervous tissue if it can be miniaturized.

 



A neurological condition named after Alice in Wonderland
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A neurological condition named after Alice in Wonderland


The "Alice in Wonderland Syndrome" is a disorienting neurological condition that affects perception. It causes people to experience a distorted perception of space, time and even of themselves

 



Your guts inside-out!
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Your guts inside-out!


Omphalocele is a birth defect in which the intestines, the liver and other organs develop outside the baby, close to the belly button.

 



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Army Ants can be used to stitch wounds


In extreme conditions, when nothing else is available, you can use an Army Ant's legs as a staple. Don't forget to remove its head when you're done

 



Stress increases empathy in women but undermines it in men
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Stress increases empathy in women but undermines it in men


According to a study