While you read this article, there is a Greenland shark in the northern ocean that was born before the USA was founded. It has seen humanity transition from sailing ships to rockets. It has seen two world wars. It sees you now (well, metaphorically). A lifespan of 392 years. And without exaggeration: in the animal kingdom, there are creatures that live 5 times longer than humans. What is their secret? Research teams around the world are trying to understand, and they have intriguing theories that could also change human aging.
Who are the longevity champions?
Greenland Shark - The Vertebrate Champion
The Greenland shark is an acrobatic fish that looks like nothing else. A large, slow body that roams the very cold waters of the Arctic Ocean. In 2016, researchers determined their age by analyzing the eye lens (a method using radioactive carbon): the age of the largest males ranged between 272 and 512 years, with an average around 392.
This means a Greenland shark caught today was young when Napoleon was fighting.
Bowhead Whale - The Mammal Champion
Large whales generally live a long time, but the bowhead whale beats them all. The oldest recorded reached 211 years. It also lives in the icy waters of the Arctic, is also slow, and is also huge (60 tons). The lifespan of a baby whale born today could reach the 23rd century.
Ocean Quahog
But the absolute winner is not a vertebrate. It is a clam named Arctica islandica. In 2007, Icelandic fishermen caught one on the seafloor, analyzed the shell layers (each layer = one year), and discovered it was 507 years old. It was born in 1499. Columbus reached America only 7 years before it was born.
Naked Mole Rat - The Mammalian Anomaly
Back on land, there is an exception: the naked mole rat. A small mammal the size of a finger. Most mammals this size live 2-4 years. The naked mole rat lives 30+ years, 10 times longer than expected. Additionally, it almost never develops cancer.
What do they all have in common?
Researchers have found surprising similarities in their genome and physiology:
1. Slow Metabolism
The Greenland shark moves at 3 km/h (humans walk faster). It holds its breath for minutes. Its heart beats slowly. The same is true for the bowhead whale. Slow life = less metabolic damage, fewer free radicals, less cell wear and tear.
2. Exceptional DNA Repair
In the bowhead whale, a highly active ERCC1 gene was identified - an enzyme that repairs DNA damage. Additionally, its BRCA1/2 (which in humans, mutations cause cancer) function several times better.
3. Unique Anti-Cancer Mechanisms
The risk of cancer increases roughly linearly with body size and lifespan. A whale with 1,000 times more cells than a human, and living 4 times longer, should be in a cancer epidemic. But it is not. Why?
Researchers found that the bowhead whale has a p53 gene that is easily activated. p53 is the "guardian of the genome" - a protein that instructs a cell to commit suicide if DNA is damaged. In the bowhead whale, it is particularly sensitive. Any cell with a defect is eliminated immediately and does not cause cancer.
4. Exceptional Resistance to Oxidative Stress
Naked mole rat: its cells do not respond to oxidative stress to the same extent as other mammalian cells. It can live in low-oxygen environments (underground burrows) that would kill other mammals within minutes.
5. Active Telomerase Throughout Life
In humans, telomerase (the enzyme that repairs telomeres) is only active in stem cells. In most tissues, it is silent. The Greenland shark maintains active telomerase in all tissues. This explains part of its ability to stay young for centuries.
Why can't we just copy it?
If we have the genes that work in the bowhead whale, why don't we transplant them into humans?
Answers:
1. Complex System Size
These genes do not work alone. They operate in the context of thousands of other genes. In the whale, they are all adapted to each other. In humans, transplanting one gene could break the balance.
2. Side Effects
Overly sensitive p53 in humans = too many cell deaths = accelerated aging or dysfunctional systems.
3. Long Evolution
The whale and Greenland shark developed their genes over millions of years. Human evolution took a different direction.
But there are practical lessons
Even if we don't transplant genes, we can learn principles:
1. Metabolic Slowing
Moderate caloric restriction (a 10-15% reduction in calories) slows metabolism and is already proven to extend lifespan in mice. In humans, the evidence is less strong but encouraging.
2. Reducing Oxidative Damage
A diet rich in antioxidants (vegetables, berries), avoiding smoking, and moderate physical activity. All have been proven in humans.
3. Drugs That Mimic the Effect
Pharmaceutical companies are trying to develop molecules that mimic some of the effects seen in these old animals. Rapamycin is already considered one of them: it accelerates autophagy, a process also active in the bowhead whale.
4. Research on Active Stem Cells
If we can safely activate telomerase in human stem cells (without promoting cancer), we could significantly extend lifespan. This is what Life Biosciences and Altos Labs are trying to do.
What can be taken today?
Insights from the oldest animals:
- Don't rush: Everything "high energy and fast" wears out. Slow sleep, slow breathing, moderate movement
- Protect your DNA: Anti-inflammatory diet, avoid UV radiation, plant-based antioxidants
- Reduce cancer risk: Regular checkups, physical activity, healthy lifestyle
- Live in cold water: Not really (but cold baths and saunas can help)
The Bottom Line
No one will live 400 years like the Greenland shark. But its story (and that of the bowhead whale, naked mole rat, and Arctic clam) shows that aging is not an unbreakable law of nature. Biology knows how to do more than it does in us. The more we understand their secrets, the more we can gradually engineer our own biology for healthier, longer lives.
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