Si vous êtes passionné par la chasse aux fossiles ou si vous adorez les découvertes étonnantes, ne manquez pas notre dernière vidéo sur les fossiles les plus incroyables jamais découverts. Nous vous emmènerons à la découverte de trouvailles incroyables qui ont stupéfié le monde de l'archéologie. Des créatures préhistoriques aux plantes anciennes, ces fossiles racontent des histoires vieilles de millions d'années. Que vous soyez un amateur de fossiles chevronné ou simplement curieux du passé, c'est quelque chose que vous devez absolument voir. Appuyez sur lecture et rejoignez-nous dans cette exploration fascinante ! Ne manquez pas ces découvertes stupéfiantes. Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
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Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
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Si tu en veux encore plus, fais un tour ici:
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FunTranscript
00:00A fragment of a whale's rib has recently been discovered in a mine in North Carolina.
00:04This may seem anecdotal.
00:06Why a whale could not be a bottom miner, after all?
00:09However, this piece provides scientists with a rare opportunity
00:13to study the interactions between prehistoric sharks and whales dating from 3 to 4 million years.
00:19This fragment of rib has three teeth marks,
00:21revealing that this whale has been bitten by an animal with extremely powerful jaws.
00:26According to the spacing of the marks, which reaches nearly 6.3 cm,
00:30it is possible that it is a large-toothed shark, such as the megalodon,
00:34or another species of shark that lived at that time.
00:37The curvature of the shark's jaw indicates that the animal was relatively small,
00:42with an estimated size between 4 and 6 meters.
00:45As for the whale, it seems to have been the ancestor of a blue whale, or a bass.
00:49Researchers are amazed.
00:51It is rare to find traces of interaction and animal behavior
00:55so well preserved in fossil form.
00:57After analyzing the sample,
00:59they concluded that this shark had to leave with a consequent bite,
01:03but that the whale had survived.
01:05Because most of the fossil fragment was covered with metaplastic bones.
01:09This bone material quickly forms in response to a localized infection.
01:14It is not particularly robust and is subsequently remodeled by the body into a compact bone tissue,
01:20a process that takes time.
01:22The presence of this bone indicates that the healing was incomplete,
01:25and the whale died 2 to 6 weeks after this unfortunate encounter.
01:29However, it is also possible that its death is not directly related to the infection and the wound.
01:35Only a few fossils testify to such interactions between ancient animals.
01:39There are often bite marks on the fossils,
01:42indicating where the animal died and where its carcass was devoured.
01:46But this vestige is one of the few to illustrate not only an injury inflicted by another animal,
01:51but also to demonstrate that the prey survived.
01:54All fossils arouse the enthusiasm of paleontologists.
01:57And yes, these people may have to leave their homes more often.
02:01But some fossils may seem terrifying to the general public.
02:04Take for example this image showing tentacle arms and octagonal heads.
02:09During its first appearance in the media,
02:11many netizens have advanced that it was an ancient organism from space.
02:17Others have estimated that the whole story was just an imposture.
02:20However, the image is as authentic as the fossil.
02:23This fossil is known as the Plague of Mortality,
02:27a fossilized representation of a massive extinction event affecting one or more species.
02:32In reality, this fossil contains more than a dozen specimens of a type of marine organism called crinoids.
02:38Contrary to their appearance, crinoids were not plants but marine animals.
02:43This particular species lived deeply underwater, on the ocean floor.
02:47The crinoids were related to sea stars, bears and dolphins.
02:52These creatures could anchor themselves to the seabed
02:54thanks to rods made of flexible and porous discs connected by soft fabrics.
02:59These rods were hollow and sheltered the nervous system of the animal.
03:03The crinoids absorbed oxygen through tubular feet on thin walls.
03:08Generally, these animals were more than 20 cm long
03:12and had five arms decorated with structures similar to feathered tentacles.
03:16They fed on plankton and organic matter when drifting.
03:19Although these fossil discoveries are quite fascinating,
03:23few creatures whose fossils we have
03:25have intrigued scientists as much as the monster of Thule.
03:28This strange marine creature had a toothed muzzle resembling a trunk
03:33and eyes spread out along a rigid stem.
03:36But the strangest thing is that it remains impossible to classify.
03:39Since the discovery of the monster in 1966,
03:43researchers have considered various hypotheses concerning its identity,
03:47such as segmented worms, swimming lemmas,
03:50or primitive creatures resembling eels.
03:53More recently, some have tried to link it to species of fish without jaws
03:58and with a structure similar to a spine.
04:02A team of Japanese scientists used high-resolution laser scanners
04:06to analyze in three dimensions the anatomy of the Thule monster fossils.
04:10They concluded that this enigmatic fossil could ultimately be that of an invertebrate.
04:15However, the true identity of this creature is still undetermined.
04:20In the 1950s, an amateur fossil hunter named Francis Thule
04:25discovered the strange footprint of a torpedo-shaped organism
04:28with a huge caudal jaw in the fossil deposits of Mason Creek, Illinois.
04:33Having never observed a similar creature,
04:36Thule brought his discovery to the Chicago Museum of Natural History.
04:40The institute's paleontologists were also disconcerted.
04:43Since then, scientists have still failed to locate this creature on the phylogenetic tree.
04:50In 1741, explorer and captain Vitus Jonas Bering
04:54led an expedition to map the Alaska coast.
04:58The ship he was on sank on what became the island of Bering.
05:03Half of the crew survived thanks to the discovery of a huge sea cow,
05:08or Hydrodamalis gigas.
05:10With the meat of these animals to give them strength,
05:13the sailors managed to build a small raft from debris and return home.
05:18During the return trip,
05:20a scientist in the crew devoted his time to documenting the animals and discovery plans.
05:25The sea cow was particularly remarkable because without it, the crew would not have survived.
05:31These animals were more than 8 meters long and weighed about 10 tons.
05:34All sea cows belonged to the order of the Sirenias,
05:37sea mammals closer to elephants than cows.
05:41The scientist described them as having black skin, a small head and ragged anterior limbs.
05:46These sea cows floated on the surface of the water feeding on algae.
05:49Once the existence of these animals was made public,
05:52fur trade expeditions began to exploit this very practical depot on the way.
05:57The sea cows, being very docile and easy to hunt,
06:01were exterminated barely 27 years after the scientist had spoken of them.
06:05However, this is not the saddest part.
06:08Fossil archives reveal a much darker story.
06:11Fossils have thus been found around the world, from Japan to Mexico.
06:16This indicates that these animals once prospered in the vast fields of Varek,
06:20which surrounded the entire North Pacific Basin.
06:23The reduced population discovered by the expedition
06:26was probably the last remains of a much larger population and in much better health.
06:31It is highly likely that the hunting practiced by aboriginal populations
06:34had already reduced the number of these animals to a level close to extinction.
06:38The fatal blow was carried out by Western hunters.
06:42Today, the close relatives still alive of these ancient sea cows are rarely hunted.
06:47But they themselves are threatened with extinction.
06:50For some, this amazing fossil may seem somewhat disturbing.
06:53Numulites are the fossil of animals whose name means small piece in Latin.
06:59These creatures lived and prospered in a warm and shallow sea
07:03that covered part of Egypt about 40 million years ago.
07:08The name Numulites suggests that the largest specimens
07:12were particularly popular throughout history.
07:15And in Egyptian folklore, they are even nicknamed the Angels' Coins.
07:19These creatures have a simple and unicellular structure
07:23that contrasts with their extremely complex skeletons.
07:26Observe this series of superimposed spirals.
07:29Each spiral is divided into innumerable tiny chambers
07:33and Numulites can reach up to 10 cm in diameter.
07:37However, they are fossils of unicellular animals related to amoebas.
07:41So how could they reach such a size?
07:44The reason could be in their symbiotic relationship with other smaller organisms.
07:49For modern species, these symbiotes are golden unicellular algae called diatomaceae.
07:55The shells of Numulites being relatively transparent and flat,
07:58they offer a large surface for the light necessary for the photosynthesis of diatomaceae.
08:03For reasons still debated by scientists,
08:05the presence of plant symbiotes in marine animals
08:08favors the growth of a limestone skeleton in others.
08:11Thus, the colossal size of Numulites in Egypt
08:14could be attributed to their close relationship with symbiotic diatomaceae.
08:18Does this seem plausible to you?
08:20Interestingly, Numulite species have evolved very quickly
08:24and their fossils have altered from one layer of sediment to the other.
08:27Thus, the limestone used for the pyramids of Giza
08:31is so rich in these fossils that it is designated under the name of Numulitic limestone.
08:35This limestone also contains two types of Numulite,
08:38the small lenses of slaves and the large coins of angels.
08:42However, these are not different species,
08:45but rather different stages of the life cycle of the same creature.