Avez-vous entendu parler de ces phénomènes naturels étranges comme les disques de glace tournants et les tourbillons de feu tournants ? Les scientifiques ont enfin expliqué comment ils se produisent, et c'est fascinant ! Les disques de glace tournants se forment dans des rivières à faible courant lorsqu'un morceau de glace se détache et commence à tourner, créant un cercle parfait en frottant contre d'autres glaces. Les tourbillons de feu tournants apparaissent pendant les incendies de forêt intenses lorsque la chaleur et le vent créent un vortex, formant une colonne tourbillonnante de flammes. Tout cela est dû à un mélange de température, de différences de densité et un peu de physique complexe—la nature est vraiment incroyable, n'est-ce pas ? Et elle a encore plus de surprises pour vous. Animation créée par Sympa.
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Nos réseaux sociaux :
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Stock de fichiers (photos, vidéos et autres):
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https://www.eastnews.ru
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FunTranscript
00:00At Westbrook, in Maine, people saw a huge ice disk in January 2019.
00:07This disk looked like a winter snowdrift.
00:10It was spinning in the Presume Scott River.
00:13The inhabitants gave it all kinds of names.
00:15The spinning ice plate, the frozen wheel of fortune, Jean Pass, and better ones.
00:20It is estimated that it was about 91 meters wide,
00:24which makes it one of the largest ice disks ever seen.
00:27Curiously, spinning ice disks are not a novelty.
00:31We have already seen them in Russia and in the state of Washington.
00:34They almost always form perfect circles.
00:37But how do these disks appear?
00:39In 1997, scientists said that it was the water that caused them,
00:45creating a whirlwind effect, smoothing the ice and making it perfectly circular.
00:50In 2016, other scientists said that the flow currents helped to form these disks,
00:56but that it was the changes in temperature that made them spin.
01:00Warm or cold water melts and pours the ice,
01:03which creates a whirlwind that spins the disk.
01:06The warmer the water, the faster the disk spins.
01:11Have you ever heard of Estalen lights in Norway?
01:15No, these are not Boreal auroras.
01:18These are kind of incandescent balls.
01:20They have been observed regularly since at least the 1930s.
01:23These luminous wonders appear in various colors.
01:27Sometimes they flicker, other times they just shine.
01:31Estalen lights can appear 10 to 20 times a week.
01:35They appear as well during the day as at night.
01:38They can last a few seconds or remain stationary for more than an hour.
01:43It is interesting to note that no one has any idea what they are exactly.
01:48Among the efforts made to understand these lights,
01:51let's mention the Estalen project, launched in 1983,
01:55and other subsequent projects, such as the Triangle project.
01:59Despite the research, there is no consensus on the origin of these lights.
02:03Some think that they are celestial bodies,
02:06others planes, others mirages.
02:09According to a theory, these lights are caused by dust in suspension,
02:14while another mentions the plasma formed by the ionized air
02:17and the dust resulting from the disintegration of radon.
02:21Luminous rocks are an interesting geological phenomenon
02:25that you probably didn't know about.
02:27And this is our next step on the road to mysterious natural phenomena.
02:31You will find them in the county of Bux, in the United States.
02:34If you hit these rocks with a hammer or another stone, they start to ring.
02:39Scientists have studied them, but the mystery remains.
02:43There are also different hypotheses on this subject.
02:47The size and shape of the rock blocks, as well as the way they are stacked,
02:51can affect the sounds they produce.
02:54But this does not explain why they produce a sound.
02:57It is described as metallic,
02:59but it is probably due to the density and internal tension of the rocks,
03:03and not only to their iron content.
03:05An experiment carried out in the 1960s suggested
03:08that the sounds came from an internal tension,
03:11and not from any external alteration.
03:13The rocks located in the middle of the fields have an expansion or relaxation
03:18after being cut,
03:20which indicates the presence of an internal elastic tension.
03:23A slow alteration in the dry fields could be at the origin of these tensions.
03:29The theory of residual tensions suggests that these rock blocks act like guitar strings.
03:35A de-stressed block produces a deaf sound,
03:38while a stressed block resonates at different frequencies.
03:41The blocks can continue to sound after being removed from their fields,
03:45and it is said that some of these rocks have been stolen.
03:48There are no more small sounds in most fields,
03:51and by breaking large blocks, the sounds are stopped.
03:54Massive machines are needed to move the small blocks, which weigh more than a ton.
04:00Let's talk about the fireballs of the Nagas.
04:02They only appear along the Mekong, in Asia.
04:05These fireballs are located on a trench 250 km from the river.
04:09Reddish, they naturally rise from the water to the sky.
04:13They can be the size of a spark or a basketball.
04:16According to the inhabitants, there are between a few dozen and a few thousand fireballs per night.
04:22They can be observed throughout the year.
04:25But they seem to manifest most often at the time of the full moon and at the end of autumn.
04:30Why? Nobody knows.
04:32Some have tried to scientifically explain the phenomenon.
04:36A theory suggests that phosphine from swamps could be at the origin.
04:41However, skeptics say that it is unlikely that a spontaneous combustion is at the origin of the phenomenon.
04:47According to another explanation,
04:49it would be plasma orbs created by surface electricity and floating freely.
04:55However, this phenomenon usually occurs in controlled environments,
04:59during experiments, and not in a natural way.
05:03Then we have the lightning ball.
05:06This is a very rare thing, an incandescent ball that appears in the air.
05:10They usually appear near the ground during thunderstorms,
05:13at the same time as normal lightning.
05:15They can be red, orange, yellow, white or blue,
05:19and are often accompanied by a whistling and an unpleasant smell.
05:23These luminous spheres are fast.
05:25They only last a few seconds, turn in a circle,
05:29then disappear, sometimes in silence, sometimes with a little dry noise.
05:34The ball lightning can seem disturbing, but it is generally harmless.
05:38Of course, it happens that it burns or melts objects,
05:42but it is not there to harm us.
05:44Scientists are not quite sure of what causes this phenomenon,
05:48nor its link with ordinary lightning.
05:51Some have mentioned a strange behavior of air or gases,
05:55high-density plasma, or even a whirlwind of incandescent gas.
05:59Even microwave radiation trapped in a plasma bubble is on the list.
06:04But do not confuse ball lightning with pearl lightning.
06:08This is a different phenomenon,
06:10which looks more like a pearl chaplet,
06:13and which occurs when a lightning lasts for a good second.
06:20Fall.
06:21We are now in the silent zone of Mapimi.
06:24This is a place located near Bolson de Mapimi in Mexico.
06:27History tells that in this desert area,
06:30it is impossible to capture radio signals or talk to anyone.
06:34In July 1970, a rocket from Utah deviated from its trajectory and landed here.
06:41It was carrying cobalt.
06:43The authorities had to evacuate tons of earth from the site of the accident.
06:47Today, thanks to cleaning, the silent zone is the subject of many legends.
06:52We are talking about a strange magnetic phenomenon that disturbs radios,
06:56plants and animals that undergo mutations.
06:59Inhabitants follow the movement, which stimulates tourism in the region.
07:05Very well.
07:06We can now talk a little about the sun.
07:08It is not just a big fireball.
07:11It has an exterior layer called a crown.
07:14It is a kind of invisible solar vest composed of gas.
07:18In general, you cannot see it because the sun is very bright.
07:22But there is a trick.
07:24During a total solar eclipse,
07:26when the moon slides between the earth and the sun,
07:29the crown appears, all bright and white.
07:32The crown is burning, even hotter than the surface of the sun,
07:36which is quite strange.
07:38Scientists set out on a mission to elucidate this mystery.
07:42They discovered what are called thermal bombs,
07:45which leave the sun and head towards the crown,
07:48exploding and heating the surface.
07:50But this may only be part of the puzzle.
07:53The surface of the sun is like a playground covered with magnetic fields.
07:57These magnetic fields create interesting shapes,
08:00for example, loops and serpentines.
08:03Telescopes allow us to observe these shapes up close.
08:07The crown extends relatively far and emits what are called solar winds
08:11everywhere in the solar system.
08:13These particles are so fast
08:15that they escape to the gravity of our beautiful star.
08:19And then there is a nice place,
08:21the beach of Kuala Selangor,
08:23which you can only visit when the tide is low.
08:26The times change every day
08:28and you cannot access it when the tide is high.
08:31Most of the time, the beach is hidden under the sea
08:34and does not even appear on the map.
08:36But when the tide is good, it appears,
08:38a bit like the Malaysian version of Salar Duyuni.
08:41Some people call it the mirror of the sky.
08:44Because when it is not submerged,
08:46it wonderfully reflects the sky.
08:48A great place for really beautiful photos.
08:50In addition to being an ideal place to travel,
08:53it also houses a very diverse fauna and flora,
08:56for example, swamps and other seashells
08:59that live on these sandy banks.