Forget eating right and exercise. That can only get you as far as 130 years or so. Can’t medical science find a way to make us live forever? To reverse aging and “cure” death?
Maybe it already has. Here are some far-out theories, backed by serious science, that may one day lead to immortality.
Replacement Organs

From heart attacks to kidney failure, many of the causes of death come from one or more of our organs not working properly. One way to solve that problem is to clone replacement parts from your own cells ahead of time, so if you need a new lung, it’s ready to go. And since you’re implanting something made from your own DNA, there’s no risk of tissue rejection.
The technology for this already exists: heart valves, ears, and fingers have been successfully grown in a lab, and replacement bladders have been transplanted into patients in the United States. The doctors behind that triumph are awaiting full FDA approval for more operations. Human lifespans gained about 30 years when most infectious diseases were wiped out; ending tissue failure as a cause of death could add 30 more.
Nanotechnology

Aging is a cellular process, so the only way to stop it (or reverse it) may be on the cellular level. That’s where nanotechnology comes in. The term describes microscopic devices, materials, or even robots, that can revive cells, attack viruses, repair organs, even deliver precision drug or gene therapies. Nanorobots would also destroy cancer cells more effectively than any current treatment.
For example, in 2004, researchers at Rice University sent gold “nanoshells” after tumors in mice. The shells bonded to the cancers and, when heated by a laser, were destroyed — taking the cancer cells with them. If nanomachines can be shrunk to the size of molecules, they could theoretically medicate and repair a body indefinitely, which means immortality. Research into various forms of nanomedicine is taking place all over the world, at a cost of $4 billion a year.
Computer Brains

Why all this effort to save the body, when all you really need to save is the brain? That’s the seat of your consciousness, after all. If your body gives out, you could just implant your brain into a new one, cloned from your cells and kept in cold storage until it’s needed. The problem is that our delicate cerebral nerve tissue doesn’t do well after it’s been scarred by surgery. Paraplegics and quadraplegics only have some nerve damage; a brain transferred to a new body would mean all of its connections are severed and reattached.
A more achievable goal is to only transplant the sections of the brain that maintain memory, consciousness, and “identity.” A person would wake up in a new body with full control of their motor functions. At the University of Pittsburgh, over a dozen stroke victims have regained control of paralyzed limbs by receiving injections of brain cells — and not even from their own bodies. This means that the brain might be resilient enough to endure some kind of transplantation.
Cryonics

This technology exists right now. You can arrange to have your body frozen to -321° Farenheit shortly after death in the hope that scientists in the future will be able to revive you and reverse whatever caused your death. Unfortunately, you can’t get frozen while you’re still alive and try to be revived, say, a week later; US law states that a person must be declared officially dead before they can legally be frozen. Otherwise you enter the tricky territory of assisted suicide (since the freezing process will kill you). Oh, also it runs around $150,000. But in the Utopian future, you won’t need money, right?
There are a number of exciting breakthroughs coming in the next few decades that may lead to much longer lifespans and even, possibly, immortality. Let’s just hope we’re all still alive when these discoveries happen!
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