Les scientifiques émettent l'idée que les poulpes pourraient venir de l'espace extraterrestre ! Ce n'est pas aussi fou que cela puisse paraître—certains chercheurs suggèrent que leur composition génétique complexe et leur comportement extrêmement intelligent pourraient être liés à des origines extraterrestres. Ils avancent la possibilité que des œufs de poulpe aient pu voyager jusqu'à la Terre accrochés à des comètes glacées il y a des milliards d'années, apportant ainsi les blocs constitutifs de la vie avec eux. Bien que cela reste une théorie assez farfelue, il est fascinant de considérer comment ces créatures mystérieuses auraient pu évoluer de manières que nous n'avions jamais imaginées. Alors, qui sait ? Peut-être que la prochaine fois que vous fixerez les yeux hypnotisants d'un poulpe à l'aquarium, vous apercevrez en fait un visiteur d'un autre monde ! Animation créée par Sympa.
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FunTranscript
00:00Listen to this. Peacocks are visitors to space.
00:04This is how it would have happened.
00:06Peacock eggs kept in space ice would one day have crashed on Earth.
00:12They would then have mixed their genetic information with those that already existed on our planet.
00:17And there you have it. Peacocks were born.
00:21It may be exaggerated to claim that very intelligent peacocks are extraterrestrial beings.
00:28But the idea is based on a theory that has existed since ancient Greece,
00:32known as Panspermia.
00:35Panspermia is a hypothesis that says that life exists everywhere in the universe,
00:40and not just on planets.
00:42Thus, space dust, asteroids, and even spacecraft,
00:46all carry a little life to their surface.
00:49And as they cross the galaxy, they spread life.
00:53This current of thought has caused controversy,
00:56because it goes against the idea that all life is born here, on our planet.
01:01But if this new theory of the peacock is interesting,
01:04it does not bring much to the search for life on other planets.
01:08It is too hypothetical.
01:13Peacocks are actually incredibly old.
01:16The oldest known fossil belongs to an animal that lived about 300 million years ago.
01:21Let's be clear that it was before our friends the dinosaurs traveled to planet Earth.
01:25And that's not all.
01:27The arms of the peacocks each have their brains.
01:30Indeed, two-thirds of their neurons are in their arms, and not in their heads.
01:35This means that their arms can solve the problem of opening a shell
01:39while their owner takes care of something else.
01:43Multitasking at the ninja level.
01:45In addition, like chimpanzees and dolphins,
01:48peacocks are able to maneuver tools,
01:51for example by picking up old shells and using them as a shelter.
01:56Of course, humans are the most intelligent animals.
01:59This is their opinion.
02:02But let's not give enough credit to pigs.
02:05Pigs are super smart.
02:07They can even play video games.
02:09No, not Minecraft.
02:11As part of a university study,
02:13scientists asked four pigs to play with a joystick.
02:17They had to manipulate it so that a moving ball reached a wall.
02:21And then they were given a treat.
02:23The pigs did very well on the test, to the surprise of the scientists.
02:27The pigeons also did an impressive test.
02:30They were trained to differentiate a Picasso painting from a Monet painting,
02:34which did not cause them any problems.
02:36They were then able to apply their knowledge
02:39by identifying works of art that they had never seen before.
02:43This means that they really understood the difference between each painter.
02:47And to say that they are always considered as parasites.
02:51If kangaroos were placed in a contest of the most amazing aptitude of an animal,
02:55they would win.
02:57Mainly because they break the rule of the four legs.
03:00A particular species of kangaroo, the kangaroo wheel,
03:03uses its tail to propel forward.
03:06It has four limbs, but in practice it uses five.
03:10Kangaroos naturally use their tails as a fifth limb,
03:14because it is made up of jointed vertebrae and muscles.
03:18Of course, it had to be an Australian animal.
03:23Joke aside, Australia houses a unique variety of animals,
03:28like the most venomous snake in the world.
03:30This not-so-cute reptile is known as the Taipan of the desert,
03:34and its venom would kill a hundred adults.
03:38Still in the field of dangerous animals,
03:40the continent also houses one of the most venomous spiders in the world,
03:44the black-winged spider.
03:47It is found not far from the city center of Sydney.
03:49Ouch!
03:51The little mermaid may have shown us that it is good to live under the sea,
03:55but she did not say anything about the strange bites of the boar.
03:59Boars are fish with a huge nose in the shape of a whip
04:03connected to the frontal part of their body.
04:06It looks like they always wear a lantern in front of them,
04:09except that the light of this little lantern is a bioluminescence.
04:13And it is far from romantic,
04:15because boars use it to attract smaller fish and feed them.
04:23It was in 1999 that scientists discovered that these little beings
04:27spent most of their lives upside down.
04:30They had never seen anything like it.
04:32They hovered above the bottom of the Pacific Ocean,
04:35at a depth of about 5,000 meters,
04:37where there is almost no light.
04:39They do this because, as they live near the bottom of the ocean,
04:42their integrated lanterns illuminate the ground when they are looking for food.
04:46They may be weird, but rather cunning.
04:50Recently, scientists have discovered an animal species
04:53that has neither a brain nor a head,
04:55and yet it is very intelligent.
04:57It is called the offure.
04:59This five-armed creature is a real pack of nerves.
05:03During an experiment,
05:05researchers reduced the light at the time of feeding offures
05:08with their favorite snack, delicious shrimps.
05:11After 10 months of conditioning,
05:13these creatures came out of their hiding place
05:15as soon as the scientists turned off the light in the room.
05:19They hoped to taste a good meal.
05:21We should not judge a brain by its size.
05:24Or, in this case, by its absence.
05:28There is a phenomenon known as the behavior of the orange cat.
05:32And apparently, it is not a simple meme.
05:35So far, scientists have been able to understand
05:38that the color of the fur is related to the sex of the feline.
05:41And since the orange is a chromosome X,
05:43orange cats are usually males, like Garfield.
05:47The behavior of the orange cat
05:49describes the red cats as agents of chaos.
05:52Again, it's a bit like Garfield.
05:54But no conclusive study has been carried out
05:56to find out if these two things are really related.
05:59In terms of vision,
06:01mantis shrimp probably have the most psychedelic vision of all animals.
06:05These funny-looking creatures have 16 varieties of photoreceptors,
06:09five of which are reserved for the ultraviolet or UV spectrum.
06:17Ultraviolet rays have very short wavelengths,
06:20invisible to humans.
06:22What science still does not understand
06:24is how these mantis shrimp perceive the world around them.
06:27Of course, they can perceive a large number of colors,
06:30but they cannot necessarily distinguish all these colors from each other.
06:34It is possible that they simply see
06:36a large number of very vivid and very blurry colors.
06:39But we have not yet found a way to verify it.
06:42To say that lazy people are cute is an euphemism.
06:45They may be the nicest animals in the jungle,
06:48but that's not all.
06:50If you look closely at their fur,
06:52you will notice green spots.
06:54These green spots are actually tiny algae.
06:57They allow these animals to better camouflage in the jungle,
07:01but they also feed them.
07:03The small cracks in the fur of the lazy people
07:06are a perfect environment for these algae.
07:09And scientists have discovered species of algae
07:11that do not exist anywhere else.
07:13Here are some examples.
07:15In the heart of the Sahara desert,
07:17you will find a small creature known as fennec.
07:20This big-eared animal is perfectly adapted
07:23to survive in its hostile environment.
07:26Its ears help it to dissipate the unbearable heat of the desert
07:30and to hunt underground prey.
07:32Look at this handsome boy.
07:34Contrary to what his name might suggest,
07:37he is a very cute creature.
07:39He is a very cute creature.
07:41Look at this handsome boy.
07:43Contrary to what his name might suggest,
07:45the panda bear is closer to the raccoon than the giant panda.
07:49You will find a large number of these creatures
07:51the size of a cat in the region of the Himalayas.
07:53They jump from tree to tree
07:55and fight each other
07:57to warm up in this very rigorous climate.
08:00They are sweet and friendly like their cousins the pandas
08:03and they love bamboo.
08:06And then there are the bees.
08:08Compared to that of humans,
08:10the brain of bees is the size of a pinhead.
08:13However, they are capable of amazing things.
08:17Let's suppose that a bee runs out of energy after a long flight.
08:21This bee desperately needs a drop of honey.
08:24But, clever as it is,
08:26it does not need to go back to the hive.
08:28It can ask this drop to one of its companions
08:31and continue to fly.
08:33This type of decentralized system
08:35allows them to build very efficient societies.
08:38A society in which bees do not need to queue in front of the alveoli, for example?
08:43Oh yes!