Genetically identical cells in identical environments still make different choices about what they become.
Tendons heal poorly. They have limited blood supply, repair slowly, and in older adults that repair is even slower.
Why do humans, mice, and whales show the same epigenetic aging patterns, despite living completely different lives? A new model offers a surprisingly simple answer.
Muscle stem cells in older animals struggle to activate. A new study pinpoints the reason: a specific metabolic pathway fueled by glutamine quietly shuts down with age.
Tumors damage surrounding tissue. That has long been known. But a new study shows they also actively block the renewal of nearby healthy stem cells by mimicking a signal that normally only…
Aging tissue is stiffer than young tissue. It turns out that stiffness is not just a symptom of aging — it may be one of the reasons repair fails in the first…
Age-related muscle loss has long been blamed on stem cells that simply wear out over time.
Most aging researchers focus on fixing the body’s damage. But a growing faction argues that some things are simply too broken to repair — and wants to replace them instead.
What if the key to fighting aging isn’t repairing damaged cells and organs, but simply replacing them?
The textbook account of how adult blood is made has a clean simplicity to it: bone marrow stem cells do the job, period.
Heart muscle cannot grow back after a heart attack. The dead tissue becomes scar tissue, and that scar gradually undermines the heart’s ability to pump.
Researchers have identified a molecular switch inside the body’s blood-forming cells that gets triggered by stress and appears to accelerate the aging of the immune system.
On June 4, 2026, a full-day longevity event in Lisbon will bring together scientists, clinicians, investors, and founders. The organizers promise a program stretching from ancestral nutrition wisdom to cutting-edge biotech.
When a heart attack kills part of the heart muscle, the human body has no way to replace it.
When the blood-making system comes under pressure, the body has a fallback plan. Researchers have discovered an entirely unknown pathway that allows red blood cells to acquire the building blocks for hemoglobin…
Scientists have reprogrammed blood stem cells to generate a continuous supply of protective proteins — potentially for the entire lifespan of a patient.
What if your immune system could be programmed once and then protect you for life — without ever needing a booster?
After damage, lung stem cells produce their own molecular signal that tells them when to start regenerating.
A salamander loses a leg and grows it back. We lose a fingertip and it’s gone forever.
A one-time treatment that makes your body produce its own medicines — for life. Researchers have now shown this is possible, by reprogramming blood stem cells to churn out powerful protective proteins…
Some animals simply grow a new leg when the old one is gone. Humans don’t. Scientists have known for decades that a fundamental difference must exist between species that can regenerate and…
Salamanders can regrow entire limbs. Humans can’t — with one exception: the tip of a finger.
To eventually grow replacement organs — or even whole bodies — scientists first need to understand how an embryo does it.
Frailty in older adults — the combination of muscle loss, fatigue, and heightened vulnerability — has no effective treatment.