To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Anything that tries to kill a tardigrade will quickly realize they encountered practically immortal animals. These creatures are capable of sticking around for thousands of years or even indefinitely “by entering a state of cryptobiosis, whereby their metabolism comes to a halt,” says Pastor.
While, as shown with creatures such as hydra and Planarian worms, it is indeed possible for a creature to be biologically immortal, these are animals which are physiologically very different from humans, and it is not known if something comparable will ever be possible for humans.
Rapidly advancing technologies such as AI and genetic engineering could soon mean that human beings become immortal – and anyone born after 1970 could live forever. Futurologist Dr Ian Pearson has predicted that by 2050, humans might be able to live forever – outside the confines of the human body.
Share: In the warm seas of the Mediterranean lives a jellyfish with an extraordinarily rare ability – it can rewind its life cycle. The so-called 'immortal' jellyfish, or Turritopsis dohrnii, can somehow reprogramme the identity of its own cells, returning it to an earlier stage of life.
Flatworms, nematodes, and cnidarians (jellyfish, sea anemones, and corals) do not have a circulatory system and thus do not have blood. Their body cavity has no lining or fluid within it. They obtain nutrients and oxygen directly from the water that they live . Q.
Blue blood is found in octopuses and horseshoe crabs. This is due to the fact that hemocyanin, the protein that transports oxygen in their blood, is blue. Octopuses have three hearts, which is due in part to their blue blood.
The quokka, a small marsupial native to Australia, is one such example of a species vulnerable to extinction in the country's harsh surroundings. Known as the “happiest animal in the world” due to its cute and friendly appearance, these creatures are now only found in a few isolated forests and small islands.
The strongest land animal in the world is the elephant. The typical Asian elephant has 100,000 muscles and tendons arranged along the length of the trunk, enabling it to lift almost 800 pounds. The gorilla, the strongest as well as largest primate on the planet, is at least six times stronger than the average human.
It's a common saying that elephants never forget. But the more we learn about elephants, the more it appears that their impressive memory is only one aspect of an incredible intelligence that makes them some of the most social, creative, and benevolent creatures on Earth.
They react differently when external stimuli are applied while sleeping and while awake. But the bullfrog, Lithobates catesbeianus show the same reaction in both situations. This indicates that bullfrogs do not sleep. Lithobates catesbeianus is an animal that cannot sleep.
Do spiders bleed? No spiders cannot bleed because they do not have true blood. Spiders used a circulatory fluid called haemolymph instead of blood.
Vertebrates, including mammals, birds, amphibians, reptiles and fish also have red blood because they too use hemoglobin as an oxygen transport protein.
Invertebrates like insects, spiders, aquatic arthropods and molluscs have circulatory systems that do not contain blood vessels. In these open circulatory systems, a fluid called hemolymph circulates in the interior of the body in direct contact with the tissues.
The only part of the body that has no blood supply is the cornea in the eye. It takes in oxygen directly from the air.
One group of segmented marine worms has pink blood. This is because the molecule that carries the oxygen is a type of blood pigment, known as hemerythrin, which is described as pink or purple. A few species of segmented worms don't have any oxygen-carrying molecules at all, so their blood is colourless.
The animals that do not have a heart include jellyfish, flatworms, corals & polyps, starfish, sea anemone, sponges, sea cucumbers and sea lilies. The Jellyfish is the biggest animal without a heart. It is a simple and primitive creature. It has no heart because it has no blood flowing around inside its body.
If you want a pet for life, a tortoise is one of the best options out there. Many species of tortoise live for over a century, like the Sulcata Tortoise, Leopard Tortoise, or the Egyptian Tortoise––so chances are this critter may even outlive its human owners.
Jonathan, a Seychelles giant tortoise living on the island of Saint Helena, is reported to be about 191 years old, and may, therefore, be the oldest currently living terrestrial animal if the claim is true.
Elephants can run up to 25 miles per hour. However, they remain the only mammal on earth that can't jump. They always keep one leg on the ground - even when running.