Sea Cucumber With ‘Tissue Immortality’ Challenges What It Means To Be Alive
The idea of a severed body part surviving on its own sounds like science fiction. But a surprising discovery involving a sea cucumber suggests that it may not be as far-fetched as one might believe.
While studying a North Atlantic sea cucumber called Psolus fabricii, scientists at Memorial University of Newfoundland noticed that some of its tube feet left behind in an aquarium were not decaying. Days turned into weeks, and weeks into months, yet the detached tissues remained attached to the glass. Even more surprisingly, they appeared to be healing and growing.
Intrigued, researchers tested tissue fragments from the animal’s tube feet, body, and tentacles. The pieces were placed in flowing seawater and monitored over time. Incredibly, the detached tissues repaired themselves, absorbed nutrients directly from seawater, and continued producing new cells. They also responded to touch and showed signs of an active immune system despite lacking a mouth, digestive system, or any connection to the rest of the animal.
What astonished researchers most was the environment in which the tissues survived. Most immortal cell lines used in laboratories require highly controlled, sterile conditions. These sea cucumber tissues, however, thrived in ordinary seawater filled with bacteria and other microorganisms. Even after more than three years, they showed no signs of deterioration.
Lead researcher Sara Jobson calls the tissue fragments “zombies” because they seem to exist somewhere between life and death. Unlike some sea cucumbers whose severed parts can regenerate into new individuals, these fragments remained self-sustaining pieces of living tissue.
Scientists believe the discovery could advance research on wound healing, tissue repair, aging, and biomedical engineering. It may also provide a useful, more ethical alternative to human cell lines. The finding raises an interesting question as well: If a piece of tissue can survive independently for years, what does it truly mean to be alive?
Yesel Kang Copy Editor teen/1781855221/1613367750
1. Where did scientists notice that detached tube feet tissues were not decaying?
2. From which geographical ocean did researchers collect the Psolus fabricii sea cucumber?
3. What surprising environmental condition allowed the sea cucumber tissue fragments to thrive?
4. What specific nickname did lead researcher Sara Jobson give these unique fragments?
1. Does discovering independent tissue survival challenge your personal definition of biological life?
2. Should scientific fields prioritize ethical animal tissue alternatives over human cell lines?
3. How can breakthroughs in biomedical engineering change modern treatments for wound healing?
4. Why does nature continue to surprise humanity despite advanced modern laboratory technologies?
The idea of a severed body part surviving on its own sounds like science fiction. But a surprising discovery involving a sea cucumber suggests that it may not be as far-fetched as one might believe.
What astonished researchers most was the environment in which the tissues survived. Most immortal cell lines used in laboratories require highly controlled, sterile conditions. These sea cucumber tissues, however, thrived in ordinary seawater filled with bacteria and other microorganisms. Even after more than three years, they showed no signs of deterioration.
