These fascinating creatures are called “biologically immortal,” which means they don’t age the way we expect most animals to.

They are, or we think they may be, biologically immortal. This means that ... has been known since the late 19th Century, but these animals went viral in 2012, when the University of Nottingham ...

So, The Oldest Living Animal Has To Be The ‘Immortal’ Jellyfish, Right? Despite the immortal jellyfish’s incredible ability to potentially live forever, claiming it as the oldest living ...

The immortal jellyfish takes cloning to a whole ... to new diseases or sudden changes in their environment. ALSO READ: 5 animals that never sleep and why ...

The hydrozoan Turritopsis dohrnii, an animal about 4.5 millimetres wide and tall (likely making it smaller than the nail on your little finger), can actually reverse its life cycle. It has been dubbed ...

While some animals, given the right circumstances, could be considered immortal, lobsters are not among them. Like many other decapod - ten-footed - crustaceans, lobsters continue to grow throughout ...