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.

The italicized word in the sentence above is “youngest”. The suffix of this word is “-est” connected to the root word “young”.

The suffix -less, meaning “without,” is added to nouns and verbs to form adjectives. For example, a hopeless situation is a situation without hope. Learn these words that use the suffix.

Origin of immortal From Latin immortālis, from prefix im- (“not”), from in-, + mortālis (“mortal”), from mors (“death”) (combining form mort-), + adjectival suffix -alis.

Certain scientists, futurists, and philosophers have theorized about the immortality of the human body, with some suggesting that human immortality may be achievable in the first few decades of the 21st century.

ut of the original emptiness, which was called Chaos, emerged the first three immortal beings: Gaea (Mother Earth), Tartarus, who ruled the deepest, darkest region of the Underworld, and Eros (Love), whose great beauty inspired the creation of many of the deathless gods.

Modern fantasy elves often exhibit this form of immortality….Lists of classes whose members are typically immortal include:

• Angels.
• Deities.
• Demons.
• Elves in Middle-earth.
• Fairies and sprites.
• Robots and androids.
• Undead.
• Vampires.

Wandering Jew, in Christian legend, character doomed to live until the end of the world because he taunted Jesus on the way to the Crucifixion. A reference in John 18:20–22 to an officer who struck Jesus at his arraignment before Annas is sometimes cited as the basis for the legend.

From the time they are born, immortals and “pre-immortals” cannot biologically have children. Immortals can sense each other’s presence and may take Quickening power from another of their kind by beheading them. They duel each other across the centuries, a deadly “Game” with few rules.

It is possible for the immortal jellyfish to die. The ability to transfigure is possible only once the animal has reached the adult stage. So, a polyp that was never an adult lacks the ability to transdifferentiate its cells and save its own life. Also, destroying the animal’s nerve center kills the immortal jellyfish.

They might be ‘kind of immortal’, but the immortal jellyfish are not impervious to all threats. They can be eaten by bigger creatures, or get killed by being sucked into a vent of a nuclear power plant, so they are not un-killable.

Turritopsis dohrnii medusa

zircon crystals

According to this criterion, the longest human lifespan is that of Jeanne Calment of France (1875–1997), who lived to age 122 years and 164 days.

bowhead whale

79 years

Female: 10 – 15 yearsAdult, In the wild

Mosquitoes

cassowary

Myth: Owls are bad luck/Owls are omens of death. Reality: Owls are no more bad luck than black cats, broken mirrors, or spilled salt. In many cultures, owls are seen as bad luck or omens of death and are feared, avoided or killed because of it.

Hippos

Hippos coexist with a variety of large predators. Nile crocodiles, lions and spotted hyenas are known to prey on young hippos. However, due to their aggression and size, adult hippos are not usually preyed upon by other animals.