The following list is in no particular order. As their name suggests, these tortoises are one of the largest species of tortoises in the world.
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These tortoises take a very long time to grow as they do not reach sexual maturity until over 30 years old. The oldest confirmed age of a tortoise was years. However, scientists have revealed that some may have persisted twice that age. Aside from their humongous size, another astonishing fact about bowhead whales is that they can live up to more than a hundred years.
The secret to this? They can repair damaged DNA, hence are prevented from developing cancer. Scientists also suggested that these whales can survive the absence of oxygen even for a long time.
Believe it or not, some species of clams can live up to more than years. This process too is still up for further studies. More Reading: Science Daily. This is because some species can control the growth of their spicules mineralized structures at a very slow rate, hence slowing down their aging process. Known as the longest living vertebrate with an average lifespan of years, this species of sharks does not reach sexual maturity until years. The secret to this is pretty obvious— its incredible ability to withstand the intense darkness and freezing temperature at meters depth.
More Reading: CNN. According to studies, the hydra is one of the few animals that does not show any signs of deterioration with age. Being able to continuously divide and regenerate new body cells , hydras can basically keep themselves young for long periods of time even until forever. Did you ever wonder if you could go back to being a child? This species of jellyfish can! Found in the waters of Japan and Mediterranean sea, the immortal jellyfish is the only animal which can go back to being sexually immature after reaching maturity. Scientists suggested that through time, some lobsters can persist and even increase their fertility because of a certain enzyme called telomerase.
More Reading: Sun News. Lungfishes are one of the oldest species of fish in the planet and unlike other fishes, they can breathe out of water and survive this for long periods of time. In addition to that, they can slow down their metabolic rate and live even without nutrients for years! More Reading: Environment Australia. This ubiquitous organism has a simple yet incredible organ system that allows the indefinite regeneration of any lost body part.
Because of this, this organism apparently can stay young and can never get old unless it wants to. While they can live up to more than a hundred years old, some may reach up to years, given that the environmental conditions are good. More Reading: Oregon State University.
Known as the longest living marine fish in the world, it can live more than years old!
Stronger and faster than mere mortals, they carry within them the spirit of the bear and can channel its ferocity into a berserkrage, temporarily becoming as powerful as an immortal. Once captured by the Order, immortals do not return. Thought to be an urban legend. Masters in the art of poisons. Many different subsets, including fire, ice, and forest fey. Distinguishable by their long, knifelike claws, and bodies that are forever emaciated. Will dig up graves for flesh. Undefeatable and, for the most part, uncontrollable.
Of the last seven Vessels, six have spawned evil. Some factions seek to assassinate the Vessel to prevent any birth.
Others battle to possess her and control her offspring. The name of the capricious and dangerous mined element cobalt is derived from this species. Their imperative is to increase their number by contagion. Previously thought to be truly mythical; considered abominations by most in the Lore. Strongest of any sentient immortal being. Colloquially known as vemons. Hosted by Riora, the goddess of impossibility. Won the last five times by the Valkyrie Kaderin the Cold Hearted. It's as if a butterfly suddenly reverted back into a caterpillar.
The Immortals (series) - Wikipedia
View image of An immortal jellyfish Turritopsis dohrnii, previously T. As with most cases of biological immortality, exactly how the immortal jellyfish pulls of this trick is a mystery. It seems to involve a bizarre reversed version of the cellular processes that go on during metamorphosis ; the process by which juvenile caterpillars transform into adult butterflies. Jellyfish don't have much in common with other animals, which is why their asexual reproductive strategy, and their immortality, seem so peculiar to our eyes. The two traits may actually be connected, says Bosch.
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If stem cells do play a vital role in animal biological immortality, then animals that have to carry potent stem cells in order to clone themselves might often be immortal. On the other side of the coin, a reproductive strategy built around sex is almost invariably a one-way ticket to an early death. That's certainly the case for male Antechinus , mice-like marsupials that almost literally mate themselves to death. But even in sexually reproducing animals, biological immortality isn't entirely unheard of.
The American lobster is a good example.
Most animals more or less stop growing when they reach sexual maturity, but not American lobsters. What's more, even as an adult this lobster can regrow a limb if it loses one by accident. Both of these features suggest American lobsters retain an impressive ability to regenerate, even into advanced adulthood. That might explain why large specimens are estimated to be at least years old.
The lobsters' longevity may be connected to the behaviour of their DNA. The long chromosomes in animal cells have special tips on their ends, called telomeres, that help protect the DNA. But whenever the cell divides and the chromosomes are replicated, the telomeres shorten a little bit, because the replication process can't quite reach to the very end of the chromosome.
Shorter telomeres mean a shorter lifespan. But American lobsters delay the inevitable using a telomere-lengthening enzyme called telomerase. A study revealed that this enzyme is found in all of their organs , where it presumably helps keep cells looking youthful for longer. In other words, American lobster cells apparently don't age in a normal way, making the lobsters biologically immortal.
This telomere trick looks like a useful way for any organism to delay ageing. But there's actually very little evidence that the strategy is used, either by immortal plants or by immortal "lower" animals like the jellyfish. Bosch says it might be unique to "higher" animals. Certainly, mammals also carry telomerases. In humans, they are active in HeLa cells : the first "immortal" human cells ever identified.
But in this case, the immortality is bad news. HeLa cells are so named because they were taken — without consent — from Henrietta Lacks , who died of cervical cancer in Telomerase enzymes appear to help tumours grow and spread, which might be why mammals only use them in a few types of cell. HeLa cancer cells might be immortal, but their appearance cost Henrietta Lacks her life. Cancer cells aren't the only immortal cells that can be found in the human body. Our "germ line" cells are ageless too. These are the cells that give rise to eggs and sperm, and it's vital that they can withstand ageing so that babies are born young.
The concept of young babies might sound like a tautology: surely all babies are young? But it's not, as Dolly the sheep demonstrates.
The Immortal Jellyfish: The World’s Only Immortal Animal
Dolly was cloned from sheep mammary gland cells, which aren't protected from ageing, and so she was born relatively "old". The telomeres in Dolly's cells were short even while she was a lamb , and she aged much more quickly than her non-cloned peers. Ultimately she was put down at the relatively tender age of six because of a lung disease. At this point, it should come as no surprise that we don't know how the clock is reset in our germ cells.