Draeno Posted May 22, 2023 Posted May 22, 2023 1. TARDÍGRADO Also called a water bear, it survives even in space and at very high levels of radiation, and can withstand temperatures between -200ºC and 148.9ºC. It is even possible that it is inhabiting the Moon: several specimens were traveling on an Israeli space probe that crashed on the satellite in 2019. This animal, less than a millimeter long, can return to life decades after being dehydrated. When dry, it retracts its head and all eight legs, crumples into a ball, expels almost all the water from its body, its metabolism slows to 0.01%, and it enters a death-like state of suspended animation. 2. SHAVED MOUSE He is practically impervious to pain and immune to cancer. It can live up to 30 years – ten times longer than rodents its size – and it never drinks water. Each colony has its own 'dialect'. And rats raised in a new colony, different from the one where they were born, learn the new dialect. The queen –they have a lot in common with insects– is responsible for the reproduction of the colony, and preserves the dialect. Within their colony, they work in harmony, living in close-knit and highly cooperative communities. Each one knows his rank and the tasks he must perform. But they are very aggressive with 'foreign' rats. 3. IMMORTAL JELLYFISH Biologically it can live forever in the absence of predators or disease. It is the only known animal that can completely reverse its state until sexually immature. If a specimen of this species suffers a serious injury, falls ill, feels threatened or is very hungry, it transforms back into a polyp and is reborn. It is capable of 'reconstructing' its cells and making them go back to their earliest phase in just three days. And from its new state of polyp it develops and reproduces again. Scientists have managed to demonstrate that the reborn subject, genetically speaking, is the same as the one from which it came. 4. AFRICAN LUNGFISH It is a true living fossil, as it constitutes an evolutionary step between fish and amphibians. It can survive with very low levels of oxygen, so its gill system is very small. In return, it has two lungs without bronchi. When the ponds and lakes in which it inhabits dry up, it makes a hole in the mud between 30 and 50 centimeters deep, folds in on itself, secretes a thick mucus that protects it from dehydration and seals the entrance with clay. leaving 2 or 3 small holes to allow aeration. He is able to survive like this for months, reducing his metabolism to a minimum. 5. WETA OF THE MOUNTAINS This insect freezes for months and then 'resurrects'. It can handle repeated freeze-thaw cycles without side effects. Hold 80% of your body to go to that state. It does so to survive large temperature changes, thanks to a protein that prevents its blood from crystallizing. In winter, it enters cryptobiosis (suspension of metabolic processes) and reaches a state of animated suspension, similar to death. In fact, during its cryogenic stage it plays dead (legs extended, claws exposed and jaw open) to avoid being eaten by predators. 6. AXOLOT This aquatic salamander is capable of regenerating its body and staying young all its life. He can regenerate his tail, limbs, spinal cord, part of his brain, heart, lower jaw, and other organs. Researchers are still investigating how it does it to apply it in humans. Unlike other salamanders, which undergo metamorphosis, the axolotl never outgrows its larval stage: it maintains its tadpole-shaped dorsal fin, feathery external gills, and webbed feet. Although they retain their gills, adult axolotls also have functional lungs and can breathe through their skin. 7. CLOWN FISH Although all clownfish are born male, they are hermaphrodites, and some become female. When an alpha female dies, her partner undergoes neural changes that lead to the transformation of their testicles into ovaries. This fact contributes to the survival of the species, thanks to the formation of a new reproductive pair without moving from their anemone, which provides them with shelter and with which they maintain a symbiotic relationship. Each family is made up of two or more individuals with a social hierarchy based on size. Only the two largest are mature and monogamous, and the dominant one is the female. 8. GIANT TORTOISE Turtles don't really die of old age. They could live forever if it weren't for diseases, predators... and humans. But these three factors cause its average life to be around 80 years. “Jonathan”, a Seychelles giant tortoise living on Saint Helena Island, is 190 years old. The longevity of turtles has to do with their slow metabolism, their calm temperament, their ability to go months without eating or drinking, their resistant shell, and the fact that their organs do not age over time: a lung or a kidney. of a hundred-year-old tortoise are indistinguishable from those of an adolescent. 9. PLANNARIA WORM It can regenerate organs lost after a predator attack or after mating. Even if it is divided into two pieces, the two will develop and two different planaria will emerge from them. In addition, it does not have a respiratory or circulatory system, it lacks eyes (it has two small eye spots that it uses as photoreceptors to see) and it is a hermaphrodite. More: its mouth is in the middle of the stomach and it can reproduce both sexually and asexually. During asexual reproduction, the tail detaches from the rest of the body and the lost parts are regenerated. The other part recovers the tail in a few days. 10. KANGAROO RAT It is nocturnal, and since its skin is waterproof, it hardly loses fluids, so it does not need outside water to survive. In fact, he 'manufactures' it with his own breath. By exchanging the humid outlet and inlet air, the temperature in the larynx drops and in the colder regions of the nose, chemically produced water condenses in the form of drops that it assimilates by the body. It also extracts fluid from seeds and plants, which it stores in the sweat glands in its feet. It has some bags on the outside of its cheeks in which it stores seeds that it feeds on when it can't find food. https://www.elperiodico.com/es/verde-y-azul/20230521/son-10-animales-asombrosos-mundo-13256484
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