Immortality or senescence what would you choose? In this world we old and die this is a natural cycle of most organism in earth.
It perspective of immortality varies religiously or scientifically, whatever it is, we found out some creatures that live longer naturally.
The term is ‘Biological immortality’ and it refers to a decrease in cellular degradation or stable cellular activity after a considerably long living period or sometimes throughout the entire lifecycle.
Some of the creatures can pull off mortality through gradual death, injury or by infection-this is called Senescence and a few special species achieve negligible senescence.
Presenting the animals that have lived long enough and are still kicking!
1. TINY WATERBEARS
They’re small, adorable and gummy bear like creatures these factors make them the tough animals on Planet Earth. Water bears or Tardigrades are microscopic 8 legged water inhabiting organisms that can survive under any condition. From intense space radiation, cruelest low pressure depths, adverse temperature ranges 458 F- 300 F to the harshest deserts, they can thrive with mighty prospects. Waterbears can control and stop metabolism, shed all body water content and remain dehydrated for nearly 10 years – the Tardigrades are here to stay.
2. PLANARIAN FLATWORMS
These creepy crawlers, also known as planarian worms, are famous for their regeneration abilities, where a worm cut across or lengthwise can form two separate worms. This apparently limitless regeneration also applies to aging and damaged tissue, allowing the worms to cheat death indefinitely, according to astudy at the University of Nottingham.
3. STURDY TURTLES
Slow and steady really does win the race. Turtles have been known to live for centuries, and researches have found that their organs don’t seem to break down over time. The New York Timesreports that turtles might even be able to live indefinitely if they are able to avoid predators and disease.
4. GROWING LOBSTER
There is a debate among the scientific community whether these red ocean dwellers are biologically immortal; a common cause of death is disease, not old age, and unlike other animals, lobsters grow and reproduce until they die.
One lobster captured off the coast of Newfoundland was estimated to be 140 years old, but most males survive into their early 30s while females live an average of 54 years, according toSmithsonian. Fun fact: The bigger the lobster, the older it is.
5. BACKWARD-AGING JELLYFISH
A tiny variety of jellyfish known as Turritopsis doohmii, or more commonly, the immortal jellyfish, has found a way to cheat death by actually reversing its aging process, according to National Geographic. If the jellyfish is injured or sick, it returns to its polyp stage over a three-day period, transforming its cells into a younger state that will eventually grow into adulthood all over again.
Hydras are a genus of the Cnidaria phylum. All cnidarians can regenerate, allowing them to recover from injury and to reproduce asexually. Hydras are simple freshwater animals possessing radial symmetry and no post-mitotic cells. All hydra cells continually divide. It has been suggested that hydras do not undergo senescence, and, as such, are biologically immortal. In a four-year study, 3 cohorts of hydra did not show an increase in mortality with age. It is possible that these animals live much longer, considering that they reach maturity in 5 to 10 days. However, this does not explain how hydras are consequently able to maintain telomere lengths.
This 6 species here on earth gives some insights to immortality what would you think about it?
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