Month: September 2022

IMMORTAL HYDRA. "Daniel Martinez followed 100 adult Hydra for four years, discarding the buds as they were produced. The parental animals did not undergo age-related senescence. Individual cells die in Hydra, but the organism as a whole does not have a fixed life-span. There is, however, evidence that some species of Hydra undergo senescence following sexual reproduction." https://lnkd.in/dHGbTQZ View in LinkedIn

REAGGREGATION. “Separated cells of hydra reaggregate and develop into normal animals. The regeneration of serially grafted aggregates derived from different parts of hydra tissue demonstrates that the polarity of morphogenesis in hydra is the result of the cellular composition of the tissue, not cellular orientation.” https://lnkd.in/dyrJ2cd View in LinkedIn

LACKING DEATH. "Turritopsis nutricula is a unique medusa and its transformation potential is unparalleled within the vast array of life-cycle patterns found in cnidarians. This is the first known case of a metazoan being capable of reverting completely to a clonal life stage after having achieved sexual maturity in a solitary stage. Because all T. nutricula medusae regularly underwent transformation, we must assume that organismic death does not occur in this species." http://www.biolbull.org/content/190/3/302.full.pdf View in LinkedIn

IMMORTAL REVERTANT. "Turritopsis nutricula (T. nutricula) is the one of the known reported organisms that can revert its life cycle to the polyp stage even after becoming sexually mature, defining itself as the only immortal organism in the animal kingdom." It does not experience aging. https://lnkd.in/djr7U94 View in LinkedIn

TRANSDIFFERENTIATION. "Turritopsis nutricula is the only known metazoan capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary stage. It does this through the cell development process of transdifferentiation. This cycle can repeat indefinitely, (offering) it biological immortality." (Abstract 3). https://lnkd.in/eTwTQRx View in LinkedIn

CELL CONVERSION. "Transdifferentiation is defined as the conversion of one cell type to another." https://lnkd.in/eyqSmdD View in LinkedIn

IMMORTAL JELLYFISH. "Turritopsis dohrnii, or Turritopsis nutricula, is a small (5 millimeters (0.20 in) species of jellyfish that uses transdifferentiation to replenish cells after sexual reproduction. This cycle can repeat indefinitely, potentially rendering it biologically immortal. It originated from the Caribbean sea, but has now spread around the world." http://en.m.wikipedia.org/wiki/Biological_immortality View in LinkedIn

ONTOGENY REVERSAL. "All stages of the medusa Turritopsis nutricula, from newly liberated to fully mature individuals, can transform back into colonial hydroids, either directly or through a resting period, thus escaping death and achieving potential immortality. This is the first metazoan known to revert to colonial hydroids, either directly or through a resting period, thus escaping death and achieving potential immortality." http://www.biolbull.org/content/190/3/302.full.pdf View in LinkedIn

POINT OF NO RETURN. "The onset of sexual reproduction has been hypothesized to be the point of no return in the ontogenetic sequence of any living organism." This is defied by Turritopsis nitricula. http://www.biolbull.org/content/190/3/302.full.pdf View in LinkedIn

BACTERIAL IMMORTALITY. “ Bacteria reproduce through binary fission. A parent bacterium splits itself into two identical daughter cells which eventually then split themselves in half. This process repeats, thus making the bacterium essentially immortal.” https://lnkd.in/dSv9Bfm View in LinkedIn