Vous êtes-vous déjà demandé pourquoi votre corps fait ces choses bizarres qui vous font vous dire, "Attendez, est-ce normal ?" Eh bien, nous avons des informations sur les façons étranges dont votre corps pourrait suivre ses propres règles. Des particularités uniques qui vous distinguent aux faits surprenants sur le fonctionnement de votre corps, cette vidéo est un voyage incroyable dans le monde fascinant de l'individualité. Croyez-moi, vous direz, "Je n'en avais aucune idée !" plus de fois que vous ne pouvez compter. Alors, prenez votre collation préférée, appuyez sur play, et démêlons ensemble les mystères du corps humain. Préparez-vous à être étonné ! ✨
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FunTranscript
00:00 Look at this. There are people who can bend their little finger without bending their ring finger.
00:05 But most find it difficult, or even impossible to accomplish.
00:10 When they move their middle finger or their little finger, they tend to slightly bend their ring finger as well.
00:15 Yes, for me too it is the case.
00:18 The luxation of the eye is an extremely rare condition that allows some people to bring their eyes out of their orbits.
00:25 Unfortunately, this ability has disadvantages.
00:29 It can lead to many eye problems.
00:32 Some indigenous peoples, like the Tibetans, can survive at altitudes as high as those of Mount Everest.
00:39 This rare ability is very likely to have appeared after years of evolution.
00:44 The ancestors of the modern Tibetans lived in high altitudes for thousands of years.
00:49 And their red blood cells have adapted as a result,
00:52 making it possible to survive with dangerously low oxygen levels.
00:56 The Bajau are nomads of the sea living in Southeast Asia.
01:00 These individuals have developed an extra large rat, serving as a storage of blood cells rich in oxygen.
01:06 Thanks to this, they can easily spend 5 to 10 minutes fishing underwater without going back to the surface to breathe,
01:13 if only once.
01:15 About 14% of the population is devoid of long-palm muscle.
01:20 Poor old man.
01:21 It is actually a rudimentary part of the body, and the need for it has disappeared during our evolutionary process.
01:28 So, if you do not have this muscle, do not worry.
01:32 Its absence does not affect the functioning of your forearm in any way.
01:36 About 5 to 37% of people have been deprived of wisdom teeth since their birth.
01:42 These teeth are no longer really necessary today.
01:45 They were important for our ancestors because they helped them to chew hard foods like nuts, roots and raw meat.
01:53 And the caramels, soft with the salt of Gehrend.
01:56 No, I'm making it up.
01:58 But as most of the food we eat today is transformed, wisdom teeth are no longer just a simple atavism.
02:05 Most people have only one spiral of hair implantation, which goes in the direction of needles and a watch.
02:11 But 5 people out of 100 have a double crown.
02:14 And if the two spirals are directed in the opposite direction of the needles and a watch, it makes the person even more unique.
02:21 Some scientists think there is a genetic link between the direction of this spiral and our right hand.
02:27 A little more than 8% of right-handed people have a spiral going in the opposite direction of the needles and a watch.
02:34 But in left-handed people, this number goes up to 45%.
02:38 The brain of the man ages faster than that of the woman.
02:42 As men get older, they start to complain more and more often of memory problems and lack of concentration.
02:49 At the same time, women do not have such serious problems with their memory, but they feel more often depressed.
02:55 Which one would you choose?
02:57 When a person lies, his own nose betrays him.
03:00 Psychologists at the University of Grenade discovered that when a person told a lie,
03:05 the temperature around his nose and in the inner corners of his eyes increased.
03:10 This phenomenon was named, surprise surprise, the Pinocchio effect.
03:15 The Japanese have specific bacteria, the plebeian bacteroides, in their intestines.
03:21 These bacteria help them digest sushi.
03:23 The Japanese have been eating raw algae for centuries.
03:27 The microorganisms present on the surface of these algae have entered their bodies and have actively developed.
03:33 Today, these bacteria help the Japanese to digest raw food and prevent various problems related to their diet.
03:41 Humans would have as many hairs on their bodies as chimpanzees.
03:44 The number of hairs of an individual and a chimpanzee is approximately the same.
03:49 The only difference is that human body hair is essentially useless and so thin that it is almost impossible to distinguish.
03:56 Humans do not have more genes than other species.
03:59 In fact, people have even less genes than a fly.
04:03 Tomatoes also have a lot more genes than you and me.
04:06 But we are creatures so complex.
04:08 Well, recently, scientists have concluded that the number of genes contained in a genome
04:13 was not closely related to the complexity of a living being.
04:17 Let's take a break to breathe a little.
04:20 And speaking of that, your left lung is made up of two lobes,
04:23 while your right lung is divided into three parts.
04:26 In addition, the left lung is a little smaller, because it must leave room for your heart.
04:32 Your lungs also contain about 2,400 km of respiratory vein.
04:37 It is more than half the distance between New York and Los Angeles.
04:41 There are also more than 300 million alveoli in your lungs, which are small air bags in the form of balloons.
04:47 People have five senses, among the most obvious.
04:51 Sight, smell, touch, hearing and taste.
04:55 But that's not all.
04:57 What about thermosensation, the sense of heat?
05:00 Or nociception, the perception of pain?
05:03 Or even the consciousness of one's own body, proprioception?
05:08 To understand what it is about, close your eyes and touch your nose.
05:12 Did you succeed?
05:14 It's thanks to proprioception.
05:17 This list can be much longer.
05:19 Some experts say that people have 21 to 53 senses.
05:24 Your fingers become all frizzy after spending too much time in the water.
05:28 The frizzy fingers are caused by the shrinking of your blood vessels.
05:32 When you stay in the water for a long time, your nervous system makes your capillaries retract.
05:37 Your body removes the blood from this area, and this loss of blood makes your vessels narrower.
05:43 The skin begins to fold back around them, forming these funny wrinkles.
05:47 Scientists think that this process would help us to have a better grip when our hands and feet are wet.
05:54 There are three kinds of cones in the eyes of an ordinary person.
05:57 These cones help to recognize colors in blue, red and green spectra.
06:03 Thanks to them, most people can distinguish about a million different shades.
06:09 But those who are gifted with tetachromatism have four cones in their eyes.
06:13 This feature allows them to see up to 100 million different shades.
06:17 This anomaly of vision is extremely rare, and it is much more common in women than in men.
06:23 Interestingly, most people with tetrachromatism do not even realize that they see a brighter world than others.
06:31 Not all people have round pupils.
06:34 Two out of 10,000 people have unusual-shaped pupils.
06:38 Most often, they have a form of closure.
06:41 This eye disorder is called colobom.
06:44 It should be noted that some people with this condition have no vision problems.
06:50 Only 3 to 22% of people in the world have a morton's toe or Greek foot.
06:56 It is a structure of the foot where the second toe is longer than the first.
07:00 Michelangelo's David and the Statue of Liberty both have this unusual body feature.
07:07 For my part, I prefer to have them in the form of a fan.
07:10 In some people, saliva accumulates in a gland under their tongue.
07:15 It can then be propelled by a jet when the person presses on this gland.
07:19 If the mouth is open at that moment, the jet can reach several meters.
07:24 This process, the "glavitur" effect, can occur spontaneously.
07:29 A person accidentally presses his tongue against the gland by eating,
07:33 drooling, speaking or brushing his teeth. And that's it.
07:37 Up to 35% of people could do this, but only 1% can do it on command.
07:43 I had a friend at the university who did this. Yes, it was weird.
07:48 About 18 to 35% of people have an interesting reaction to sunlight.
07:53 They "ethernuate". This phenomenon has its own name.
07:57 The photosternitatory reflex. In Greek, it means "sunlight ethernation".
08:03 Just like salamanders make their tails grow back, humans could be able to regenerate their cartilage.
08:09 It is this rubbery matter around your joints.
08:13 Recently, scientists have discovered that the cartilage could be able to repair itself.
08:19 In the most effective way, on the ankle, not very well on the knees, and less effectively on the hip.
08:24 The human brain is composed of 73% water, just like your heart.
08:29 That's why if your brain loses only 2% of water, you start to feel exhausted.
08:35 It also affects your memory, reduces your attention capacity and has a negative impact on your mood.
08:42 So, drink a shot.
08:44 Your brain constantly processes tons of visual information, about 600 million bits per minute.
08:51 Everything starts when the light crosses the cornea.
08:54 The protective outer layer is transparent to your eye.
08:58 Then, the light turns into electrical signals.
09:02 They move towards your brain and interpret them in images you see.
09:06 This complex process takes place in a few milliseconds.
09:10 People who live up to 110 years and older, known as "super centenarians", could have a secret.
09:17 Researchers have discovered that their immune cells, called the auxiliary T lymphocyte,
09:24 could change and adapt to the last stage of aging.
09:28 These cells are likely to protect them from viruses and other health problems.
09:33 We have become multitasking workers thanks to technology.
09:37 Or rather, it seems to be the case.
09:40 The human brain cannot focus on two things at once.
09:44 What it can do is to quickly switch from one task to another.
09:48 But this reduces your attention span and short-term memory loss, as well as your learning capacity.
09:54 So, give me this phone back.
09:57 (upbeat music)