Researchers Mapped Biology of Greenland Sharks
New studies revealed the complex genetic markers and aging processes of the longest-lived vertebrate species.
Updated on Sept. 28, 2026 in Life Sciences
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In 2026, researchers published findings detailing the genome and heart aging mechanisms of Greenland sharks, which are recognized as the longest-lived vertebrate species. The work provides deeper insight into the biological signs of aging in these creatures, which inhabit Arctic and North Atlantic waters.
Why it matters
Understanding how Greenland sharks achieve their extreme longevity offers significant implications for the study of cellular health and aging in vertebrates. This data helps scientists clarify the complex biological processes that allow these animals to survive for centuries.
Researchers used radiocarbon dating on the eye lenses of 28 female sharks to track aging, noting a growth rate of 1 centimeter or less per year. Genetic analysis identified clear indicators of fibrosis, oxidative stress, and damaged mitochondria in the heart tissue.
The details
By examining nuclei in eye lenses, scientists were able to analyze material formed during the birth of the sharks to confirm their unique growth patterns. The sharks do not reach sexual maturity until approximately 156 years of age, reflecting their remarkably slow life history.
Timeline
2016: Landmark study published in Science on shark lifespans.
2025: Canadian assessment noted lack of independent validation for estimates.
2026: New research on shark heart ageing published in Aging Cell.
2026: Study on Greenland shark genome published in PNAS.
The Big Picture
This research advances the legacy established by the 2016 Science study on Greenland shark lifespans by moving from age estimation to understanding the underlying genetic and cardiac processes of longevity. It confirms that the shark remains a critical model for investigating the limits of vertebrate survival.
While these findings focus on wild marine life, the genetic mapping of long-lived species could eventually yield new insights into human cardiovascular health and cellular maintenance. Continued research may identify proteins or pathways that protect against age-related damage in all vertebrates.
The takeaway
The study of Greenland sharks highlights the immense potential for biological adaptation in extreme environments. Understanding these unique genetic features may eventually rewrite our current definitions of aging and lifespan across the animal kingdom.
Further reading
Learn more about advancements in Life Sciences and their impact on understanding species longevity.
Source note: This article includes information reported by International Business Times UK.
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