• 3 months ago
Ces vieux bâtiments délabrés semblent avoir une histoire à raconter. Eh bien, il se trouve qu'ils pourraient en fait cacher de sérieusement effrayants secrets! Pensez-y : ces planchers qui grincent et ces murs qui s’effritent ? De plus, qui sait quels types de bestioles effrayantes ont fait de ces lieux leur maison au fil des ans ? Et n'oublions pas la possibilité d'artefacts maudits ou d'esprits anciens qui se cachent dans l'ombre, juste en attendant de déchaîner leur colère sur des intrus innocents ! Donc, si vous tombez un jour sur un vieux bâtiment qui semble avoir connu de meilleurs jours, mon conseil ? Avancez avec prudence, ou mieux encore, évitez-le complètement ! Animation créée par Sympa.
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Transcript
00:00 In the early 1920s, the world was fascinated by the phenomenon of the "King in Camon"
00:07 A British archaeologist named Howard Carter discovered the tomb of the young pharaoh in the Valley of Kings in Egypt in 1922
00:14 But the public's interest was not limited to gold and jewels discovered
00:18 The press widely covered the curse of the pharaohs
00:21 But was it founded?
00:23 Was an old curse really responsible for the inexplicable deaths that occurred at each incursion in the pyramids?
00:29 At the time, it was the only explanation for a series of mysterious deaths
00:33 One of the men present at the opening of the funeral chamber of Toutankhamon, George Herbert, the fifth count of Carnarvon, only survived five months after this discovery
00:43 He had also financed the excavations
00:45 Then comes Sir Arthur Conan Doyle, you probably know him, the English writer who is behind Sherlock Holmes
00:52 He advanced that an evil elementary school was responsible for the death of the explorer
00:57 He must have been joking, alas, no
01:00 The newspapers continued to associate the curse of the pharaohs with each death of an Egyptologist
01:04 As their name suggests, it is the scientists who study the ancient Egyptian cultures
01:09 The archaeologist who opened the tomb of the King Toutankhamon died 17 years after the discovery
01:14 The cause of his death, Hodgkin's disease, was not a secret
01:18 Despite this, journalists from all over the world continued to evoke a curse, which began to fray the ridicule
01:25 Science should provide a rational explanation, right?
01:29 Well, that's exactly what it did, and it was linked to the presence of common mold
01:34 Harmful fungi such as aspergillus can survive for long periods in sealed graves
01:40 When inhaled by people whose immune system is weakened, it can lead to a high risk of infection
01:46 Today, doctors think that this is what happened to the unfortunate explorer more than a century ago
01:52 Scientists now know that this type of fungus thrives particularly well on cereals
01:57 However, the tomb of Toutankhamon was filled with offerings in the form of baskets filled with raw cereals and bread
02:03 Researchers have also found other varieties of fungi on ancient Egyptian mummies
02:08 These molds can cause serious complications for human beings
02:11 The inherent danger of decomposing organic matter is very real
02:15 Just look inside your refrigerator
02:18 All the remaining food begins to decompose after only 3 to 4 days
02:23 You can therefore imagine what happens with food in a sealed room for thousands of years
02:28 Food is only one type of organic material, wood is another
02:33 When it is exposed to water or air humidity, it also begins to deteriorate
02:38 It is not necessary to go to Egypt to observe the effects of this process
02:43 Any abandoned building in your neighborhood can testify to this
02:46 When a piece of wood is wet and has no way to dry, this is where the damage occurs
02:52 Fungi to xylophagous insects, the list is long
02:56 The rotting of wood poses a considerable structural problem
03:00 Because the beams and floors are often made of this material
03:03 It is therefore preferable not to enter a building in decay, at the risk of easily losing a foot
03:09 But this is only the emerging part of the iceberg
03:12 Building materials have evolved since the time of the pharaohs, but the associated risks have also changed
03:18 A striking example is lamient
03:20 Until the 1970s, this substance was widely used in many domestic insulation materials, boiler rooms, insulation
03:29 Equipped with microfibers, lamient offered remarkable thermal insulation
03:34 However, the United States banned its use in 1989, followed by Europe the following decade
03:41 This decision was motivated by the risk to health that lamient represents when it is damaged
03:47 The inhalation of these fibers can lead to serious health problems
03:50 And abandoned structures often fill with this material, without anyone to ensure its maintenance
03:56 You now understand the danger involved
03:58 Another material frequently found in old buildings is lead
04:02 The Romans of Antiquity used lead pipes to run water from springs to their homes
04:08 And they also used lead kitchen utensils, which was probably not the most wise decision
04:14 Indeed, lead and water do not do good cleaning due to a phenomenon called corrosion
04:19 But this problem is not only historical
04:22 American authorities banned the use of lead pipes only in 1986
04:27 Which means that 7% of American homes still use water pipes made of this metal
04:33 In addition, until the mid-1960s, lead paint was commonly used to cover up woodwork
04:41 In abandoned buildings, this coat of paint has long been scratched, thus exposing the lead dust
04:48 That anyone who handles doors and windows may inhale
04:52 Dust particles are at least visible to the naked eye, which is not the case with carbon monoxide
04:58 This gas is incolor, so impossible to see, and inodor, so impossible to smell
05:04 It is therefore difficult to detect a carbon monoxide leak
05:08 How does this dangerous gas usually escape?
05:10 Due to poor maintenance
05:12 However, abandoned buildings do not benefit from any
05:15 So, while you are exploring an old factory, you could suddenly feel dizziness and terrible headaches
05:22 These are just a few of the symptoms of carbon monoxide poisoning, among the most common
05:27 But what is the source?
05:29 It is enough for an old boiler to finally give in after years of neglect
05:33 We are facing a crucial question
05:35 What is the main determinant of air quality inside a room?
05:40 If you think of oxygen, you are going the wrong way
05:43 In reality, oxygen levels only decrease by 0.3% in 8 hours in a hermetically closed room
05:50 This decrease is even more minimal in normal conditions, where doors and windows are not sealed
05:56 Thus, oxygen is not the main concern
05:59 It is rather the levels of carbon dioxide, or CO2, which increases considerably inside a closed room
06:06 This comes directly from human breathing
06:09 We inhale oxygen and exhale CO2, which thus becomes a residual gas
06:15 Normally, it represents only a tiny fraction of the air we breathe, or 0.04%
06:21 However, in a closed room, high levels of carbon dioxide can cause insomnia
06:27 And this is the last thing you need when you find yourself in a dilapidated building
06:31 Carbon dioxide will reduce your ability to think clearly
06:35 An interesting study conducted by Harvard researchers in 2016 shows this
06:39 They invited office workers to come and work for 6 consecutive days to perform a problem-solving test
06:46 During the week, carbon dioxide levels gradually increased in this fictitious office
06:52 The results of the same test deteriorated over time
06:55 Of course, many factors come into play
06:58 But CO2 levels undoubtedly had an impact on the ability of the workers to solve the problems
07:04 This study took place in a typical office environment, and not in a ruined building where visitors must monitor each of their steps
07:12 When I talk about visitors, I really refer to intruders
07:16 And intrusion is a crime, applicable to both private and public property
07:21 If you break the law, you could face a fine of up to 15,000 euros, or even a prison sentence
07:28 This is what should make you think twice before jumping over a fence with a banner
07:34 In addition, you could not be alone inside
07:38 You will never know who else is in the building
07:41 You could be a malicious person
07:43 Who knows, this threat is not necessarily represented by a person
07:47 Animals can also be dangerous
07:50 You would be afraid to meet a rat, for example
07:53 But the poor animal would be just as afraid and could bite you
07:57 Rats can transmit a fairly long list of diseases
08:00 But their teeth can also cause other damage
08:03 As they constantly grow, rats must constantly gnaw to prevent them from becoming too long
08:09 If you have ever had a small late-blooming, you understand this feeling
08:14 Electric cables are often the first target of rodents and abandoned buildings in the middle of nowhere
08:20 The old wiring is already dangerous in itself
08:23 The structures built before 1984 often used aluminum wires
08:28 Today, copper is preferred
08:30 Because an aluminum wire is 55 times more likely to catch fire than a copper wire
08:36 A simple gesture, like turning on a switch in a dilapidated building, can cost you your life
08:41 Be careful of the revealing signs that something is wrong
08:45 Flickering lights, sparks at the sockets or a smell of smoke
08:50 In addition, do not count on a ground socket to protect you from electrocution
08:54 Because they have become the norm since the 1960s

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