“Coming Back from the Dead” Is No Longer Science Fiction
Last year, there were widespread reports of a 53-year-old Frenchman who had suffered a cardiac arrest and "died," but was then resuscitated back to life 18 hours after his heart had stopped.
The once black-and-white line between life and death is now blurrier than ever.
This was thought to have been possible in part because his body had progressively cooled down naturally after his heart had stopped, through exposure to the outside cold. The medical team who revived him were reported as being "stupefied" that they had been able to bring him back to life, in particular since he had not even suffered brain damage.
Interestingly, this man represents one of a growing number of extraordinary cases in which people who would otherwise be declared dead have now been revived. It is a testament to the incredible impact of resuscitation science -- a science that is providing opportunities to literally reverse death, and in doing so, shedding light on the age-old question of what happens when we die.
Death: Past and Present
Throughout history, the boundary between life and death was marked by the moment a person's heart stopped, breathing ceased, and brain function shut down. A person became motionless, lifeless, and was deemed irreversibly dead. This is because once the heart stops beating, blood flow stops and oxygen is cut off from all the body's organs, including the brain. Consequently, within seconds, breathing stops and brain activity comes to a halt. Since the cessation of the heart literally occurs in a "moment," the philosophical notion of a specific point in time of "irreversible" death still pervades society today. The law, for example, relies on "time of death," which corresponds to when the heart stops beating.
The advent of cardiopulmonary resuscitation (CPR) in the 1960s was revolutionary, demonstrating that the heart could potentially be restarted after it had stopped, and what had been a clear black-and-white line was shown to be potentially reversible in some people. What was once called death—the ultimate end point— was now widely called cardiac arrest, and became a starting point.
From then on, it was only if somebody had requested not to be resuscitated or when CPR was deemed to have failed that people would be declared dead by "cardiopulmonary criteria." Biologically, cardiac arrest and death by cardiopulmonary criteria are the same process, albeit marked at different points in time depending on when a declaration of death is made.
The apparent irreversibility of death as we know it may not necessarily reflect true irretrievable cellular damage inside the body.
Clearly, contrary to many people's perceptions, cardiac arrest is not a heart attack; it is the final step in death irrespective of cause, whether it be a stroke, a heart attack, a car accident, an overwhelming infection or cancer. This is how roughly 95 percent of the population are declared dead.
The only exception is the small proportion of people who may have suffered catastrophic brain injuries, but whose hearts can be artificially kept beating for a period of time on life-support machines. These people can be legally declared dead based on brain death criteria before their hearts have stopped. This is because the brain can die either from oxygen starvation after cardiac arrest or from massive trauma and internal bleeding. Either way, the brain dies hours or possibly longer after these injuries have taken place and not just minutes.
A Profound Realization
What has become increasingly clear is that the apparent irreversibility of death as we know it may not necessarily reflect true irretrievable cellular damage inside the body. This is consistent with a mounting understanding: it is only after a person actually dies that the cells in the body start to undergo their own process of death. Intriguingly, this process is something that can now be manipulated through medical intervention. Being cold is one of the factors that slows down the rate of cellular decay. The 53-year-old Frenchman's case and the other recent cases of resuscitation after prolonged periods of time illustrate this new understanding.
Last week's earth-shattering announcement by neuroscientist Dr. Nenad Sestan and his team out of Yale, published in the prestigious scientific journal Nature, provides further evidence that a time gap exists between actual death and cellular death in cadavers. In this seminal study, these researchers were able to restore partial function in pig brains four hours after their heads were severed from their bodies. These results follow from the pioneering work in 2001 of geneticist Fred Gage and colleagues from the Salk Institute, also published in Nature, which demonstrated the possibility of growing human brain cells in the laboratory by taking brain biopsies from cadavers in the mortuary up to 21 hours post-mortem.
The once black-and-white line between life and death is now blurrier than ever. Some people may argue this means these humans and pigs weren't truly "dead." However, that is like saying the people who were guillotined during the French Revolution were also not dead. Clearly, that is not the case. They were all dead. The problem is not death; it's our reliance on an outdated philosophical, rather than biological, notion of death.
Death can no longer be considered an absolute moment but rather a process that can be reversed even many hours after it has taken place.
But the distinction between irreversibility from a medical perspective and biological irreversibility may not matter much from a pragmatic perspective today. If medical interventions do not exist at any given time or place, then of course death cannot be reversed.
However, it is crucial to distinguish between biologically and medically: When "irreversible" loss of function arises due to inadequate treatment, then a person could be potentially brought back in the future when an alternative therapy becomes available, or even today if he or she dies in a location where novel treatments can slow down the rate of cell death. However, when true irreversible loss of function arises from a biological perspective, then no treatment will ever be able to reverse the process, whether today, tomorrow, or in a hundred years.
Probing the "Grey Zone"
Today, thanks to modern resuscitation science, death can no longer be considered an absolute moment but rather a process that can be reversed even many hours after it has taken place. How many hours? We don't really know.
One of the wider implications of our medical advances is that we can now study what happens to the human mind and consciousness after people enter the "grey zone," which marks the time after the heart stops, but before irreversible and irretrievable cell damage occurs, and people are then brought back to life. Millions have been successfully revived and many have reported experiencing a unique, universal, and transformative mental state.
Were they "dead"? Yes, according to all the criteria we have ever used. But they were able to be brought back before their "dead" bodies had reached the point of permanent, irreversible cellular damage. This reflects the period of death for all of us. So rather than a "near-death experience," I prefer a new terminology to describe these cases -- "an actual-death experience." These survivors' unique experiences are providing eyewitness testimonies of what we will all be likely to experience when we die.
Such an experience reportedly includes seeing a warm light, the presence of a compassionate perfect individual, deceased relatives, a review of their lives, a judgment of their actions and intentions as they pertain to their humanity, and in some cases a sensation of seeing doctors and nurses working to resuscitate them.
Are these experiences compatible with hallucinations or illusions? No -- in part, because these people have described real, verifiable events, which, by definition are not hallucinations, and in part, because their experiences are not compatible with confused and delirious memories that characterize oxygen deprivation.
The challenge for us scientifically is understanding how this is possible at a time when all our science tells us the brain shuts down.
For instance, it is hard to classify a structured meaningful review of one's life and one's humanity as hallucinatory or illusory. Instead, these experiences represent a new understanding of the overall human experience of death. As an intensive care unit physician for more than 10 years, I have seen numerous cases where these reports have been corroborated by my colleagues. In short, these survivors have been known to come back with reports of full consciousness, with lucid, well-structured thought processes and memory formation.
The challenge for us scientifically is understanding how this is possible at a time when all our science tells us the brain shuts down. The fact that these experiences occur is a paradox and suggests the undiscovered entity we call the "self," "consciousness," or "psyche" – the thing that makes us who we are - may not become annihilated at the point of so-called death.
At New York University, the State University of New York, and across 20 hospitals in the U.S. and Europe, we have brought together a new multi-disciplinary team of experts across many specialties, including neurology, cardiology, and intensive care. Together, we hope to improve cardiac arrest prevention and treatment, as well as to address the impact of new scientific discoveries on our understanding of what happens at death.
One of our first studies, Awareness during Resuscitation (AWARE), published in the medical journal Resuscitation in 2014, confirmed that some cardiac arrest patients report a perception of awareness without recall; others report detailed memories and experiences; and a few report full auditory and visual awareness and consciousness of their experience, from a time when brain function would be expected to have ceased.
While you probably have some opinion or belief about this based upon your own philosophical, religious, or cultural background, you may not realize that exploring what happens when we die is now a subject that science is beginning to investigate.
There is no question more intriguing to humankind. And for the first time in our history, we may finally uncover some real answers.
Americans Fell for a Theranos-Style Scam 100 Years Ago. Will We Ever Learn?
The huckster understands what people want – an easy route to good health -- and figures out just how to provide it as long as no one asks too many questions.
"Americans are very much prone to this sort of thinking: Give me a pill or give me a magical bean that can make me lose weight!"
The keys to success: Hoopla, fancy technology, and gullibility. And oh yes, one more thing: a blood sample. Well, lots and lots of blood samples. Every testing fee counts.
Sound familiar? It could be the story of the preternaturally persuasive Elizabeth Holmes, the disgraced founder of Theranos who stands accused of perpetrating a massive blood-testing fraud. But this is a different story from a different time, one that dates back 100 years but sounds almost like it could unfold on the front page of The Wall Street Journal today.
The main difference: Back then, watchdogs thought they'd be able to vanquish fake medicine and scam science. Fat chance, it turned out. It seems like we're more likely to lose-weight-quick than make much of a dent into quackery and health fraud.
Why? Have we learned anything at all over the past century? As we sweep into a new decade, experts says we're not as advanced as we'd like to think. But the fight against fraud and fakery continues.
Quackery: As American As America Itself
In the 17th century, British healers of questionable reputation got a new name -- "quack," from the Dutch word "quacksalver," which originally referred to someone who treats others with home remedies but developed a new meaning along the lines of "charlatan." And these quacks got a new place to sell their wares: the American colonies.
By 1692, a Boston newspaper advertised a patent medicine that promised to cure "the Griping of the Guts, and the Wind Cholick" and – for good measure – "preventeth that woeful Distemper of the Dry Belly Ach." A couple centuries later, the most famous woman in the United States wasn't a first lady or feminist but a hawker of nostrums named Lydia Estes Pinkham whose "vegetable compound" promised to banish "female complaints." One advertisement suggested that the "sure cure" would have saved the life of a Connecticut clergyman whose wife killed him after suffering from feminine maladies for 16 years.
By the early 20th century, Americans were fascinated by electricity and radiation, and both healers and hucksters embraced the new high-tech era. Men with flagging libidos, for example, could irradiate their private parts with the radioactive Radiendocrinator or buy battery-powered electric belts equipped with dangling bits to supercharge their, um, dangling bits.
The Rise of the Radio Wave 'Cure'
Enter radionics, the (supposed) science of better health via radio waves. The idea was that "healthy people radiate healthy energy," and sickness could be reversed through diagnosis and re-tuning, write Dr. Lydia Kang and Nate Pedersen in their 2017 book "Quackery: A Brief History of the Worst Ways to Cure Everything."
Detecting illness and fixing it required machinery -- Dynamizers, Radioclasts and Oscillocasts – that could cost hundreds of dollars each. Thousands of physicians bought them. Fortunately, they could work remotely, for a fee. The worried-and-potentially-unwell just needed to send a blood sample and, of course, a personal check.
Sting operations revealed radionics to be bogus. A skeptic sent a blood sample to one radionics practitioner in Albuquerque who reported back with news of an infected fallopian tube. In fact, the blood sample came from a male guinea pig. As an American Medical Association leader reported, the guinea pig "had shown no female characteristics up to that time, and a postmortem examination yielded no evidence of ladylike attributes."
When Quackery Refused to Yield
The rise of bogus medical technology in the early 20th century spawned a watchdog industry as organizations like the American Medical Association swept into action, said medical historian Eric Boyle, author of 2012's "Quack Medicine: A History of Combating Health Fraud in Twentieth-Century America."
"When quackery was recognized as a major problem, the people who campaigned for its demise were confident that they could get rid of it," he said. "A lot of people believed that increased education, the truths of science, and laws designed to protect consumers would ultimately drive quackery from the marketplace. And then throughout the century, as modern medicine developed, and more effectively treated one disease after another, many observers remained confident in that prediction."
There's a bid to "flood the information highway with truth to turn the storm of fake promotional stuff into a trickle."
But fake medicine persisted as Americans continued their quest to get- healthy-quick… or get-rich-quick by promising to help others to get- healthy-quick. Even radionics refused to die. It's still around in various forms. And, as the Theranos scandal reveals, we're still hoping our blood can offer the keys to longevity and good health.
Why Do We Still Fall for Scams?
In our own era, the Theranos company rose to prominence when founder and CEO Elizabeth Holmes convinced journalists and investors that she'd found a way to cheaply test drops of blood for hundreds of conditions. Then it all fell apart, famously, when the world learned that the technology didn't work. The company has folded, and Holmes faces a federal trial on fraud charges this year.
"There were a lot of prominent, very smart people who bought into the myth of Elizabeth Holmes," a former employee told "60 Minutes," even though the blood tests never actually worked as advertised.
Shouldn't "prominent, very smart people" know better? "People are gullible," said Dr. Stephen Barrett, a psychiatrist and leading quack-buster who runs the QuackWatch website. But there's more to the story. According to him, we're uniquely vulnerable as individuals to bogus medicine.
Scam artists specifically pinpoint their target audiences, such as "smart people," desperate people and alienated people, he said.
Smart people, for example, might be overconfident about their ability to detect fraud and fall for bogus medicine. Alienated people may distrust the establishment, whether it's the medical field or government watchdogs, and be more receptive to alternative sources of information.
Dr. Barrett also points a finger at magical thinking, which comes in different forms. It could mean a New Age-style belief that our minds can control the world around us. Or, as professional quack-buster Alex Berezow said, it could refer to "our cultural obsession with quick fixes."
"Americans are very much prone to this sort of thinking: Give me a pill or give me a magical bean that can make me lose weight! But complex problems need complex solutions," said Berezow, a microbiologist who debunks junk science in his job as a spokesman for the American Council on Science & Health.
American mistrust of expertise makes matters worse, he said. "When I tell people they need to get vaccinated, I'm called a shill for the pharmaceutical industry," he said. "If I say dietary supplements generally don't work, I'm a shill for doctors who want to keep people sick."
What can ordinary citizens do to protect themselves from fake medicine? "You have to have a healthy skepticism of everything," Berezow said. "When you come across something new, is someone trying to take advantage of you? It's a horrible way to think about the world, but there's some truth to it."
"Like any chronic disease, we will have to live with it while we do our best to fight it."
The government and experts have their own roles to play via regulation and education, respectively. For all the criticism it gets, the Food & Drug Administration does serve as a bulwark against fakery in prescription medicine. And while celebrities like Gwyneth "Goop" Paltrow hawk countless questionable medical products on the Internet, scientists and physicians are fighting back by using social media as a tool to promote the truth. There's a bid to "flood the information highway with truth to turn the storm of fake promotional stuff into a trickle," said Dr. Randi Hutter Epstein, a writer in residence at Yale School of Medicine and author of 2018's "Aroused: The History of Hormones and How They Control Just About Everything."
What's next? Like death, taxes and Cher, charlatans are likely to always be with us. Boyle quoted the late William Jarvis, a pioneering quack-buster in the late 20th century who believed health fraud would never be eradicated: "Like any chronic disease, we will have to live with it while we do our best to fight it."
Five Memorable Animals Who Expanded the Scientific Frontier
Untold numbers of animals have contributed to science, in ways big and small. Studying cows and cowpox helped English doctor Edward Jenner create a smallpox vaccine; Ivan Pavlov's experiments on dogs' reactions to external stimuli heavily influenced modern behavioral psychology.
We have these five animals to thank for some of our most important scientific advancements, from space travel to better organ replacement options.
Scientists still work with rats, rabbits, and other mammals to test cosmetics and pharmaceuticals and to conduct infectious disease research. Most of these animals remain nameless and unknown to the public, but over the years, certain individuals have had an outsize effect. We have these five animals to thank for some of our most important scientific advancements, from space travel to better organ replacement options.
1) LAIKA THE DOG
Laika was the first living creature ever to orbit the Earth. In October 1957, the Soviet Sputnik I ship had made history as the first man-made object sent into Earth's orbit; Premier Nikita Khrushchev was keen to gain another Space Race victory by sending up a canine cosmonaut.
Laika ("barker" in Russian), was a stray dog, reportedly a husky-spitz mix, recruited among several other female strays for the trip. Although the scientists put extensive work into preparing Laika and the other canine finalists—evaluating their reactions to air-pressure variations, training them to adapt to pelvic sanitation devices meant to contain waste, and eventually having them live in pressurized capsules for weeks—there was no expectation that the dog would return to Earth, and only one meal's worth of food was sent up with her.
Laika the dog, with a mockup of her space capsule.
Sputnik II, six times heavier than its predecessor, launched on November 3, 1957. Soviet broadcasts reported that Laika, fitted out with surgically implanted devices to monitor her heart rate, blood pressure, and breathing rates, survived until November 12; the spacecraft stayed in orbit for five more months, burning up when it re-entered the atmosphere.
At the time, the Sputnik II team reassured the world that Laika had died painlessly of oxygen deprivation. It was only decades later, in the 1990s, that Oleg Gazenko—one of the scientists and dog trainers assigned to the mission—revealed that Laika had died 5 to 7 hours after launch from a combination of heat and stress. The capsule had overheated, probably as a result of the rushed preparation; after the fourth orbit, the temperature inside Sputnik was over 90 degrees, and it's doubtful she could have survived much past that. "The more time passes, the more I'm sorry about it. We shouldn't have done it," Gazenko said. "We did not learn enough from the mission to justify the death of the dog."
Yet even the four or five orbits that Laika did complete were enough to spur scientists to press on in the effort to send a human into space.
2) HAM THE CHIMP
Four years after Laika's ill-fated flight, a chimpanzee named Ham entered suborbital flight in the American Project Mercury MR-2 mission on January 31, 1961, becoming the first hominid in space—and unlike Laika, he returned to Earth, alive, after a 16-minute flight.
Even though Ham's flight was not destined for orbit, the spacecraft and booster used on his trip were the same combination intended for the first (human) American's trip later that year. If he came back unharmed, NASA's medical team would be prepared to okay astronaut Alan Shepard's flight.
Ham receives his well-deserved apple.
For approximately 18 months before liftoff, Ham was trained to perform simple tasks, like pushing levers, in response to visual and auditory cues. (If he failed, he received an electric shock; correct performance earned him a treat. Pavlov would have been pleased.)
At 37 pounds, Ham was also the heaviest animal to ever make it to space. His vital signs and movements were monitored from Earth, and after a light electric shock from the ground team reminded him of his tasks, he performed his lever-pushing just a bit slower than he had on Earth, verifying that motion would not be seriously impaired in space.
Less than three months after Ham returned to Earth, on April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first human to complete an orbital flight; Shepard was close behind, successfully crewing the MR-3 mission on May 5. For his part, Ham "retired" to the National Zoo in Washington D.C. for 17 years, before being transferred to the North Carolina Zoological Park; he died of liver failure in 1983 at age 26. His grave is at the International Space Hall of Fame in New Mexico.
3) KOKO THE GORILLA
A western lowland gorilla born at the San Francisco Zoo, Hanabi-ko, or "Koko," became famous in the 1970s for her cognitive and communicative abilities. Psychologist Francine "Penny" Patterson, then a doctoral student at Stanford, chose Koko to work on a language research project, teaching her American Sign Language; by age four, Koko demonstrated the ability both to make up new words and to combine known words to express herself creatively, as opposed to simply mimicking her trainer.
Koko and Penny compare notes.
Koko's work with Patterson reflected levels of cognition that were higher than non-human primates had previously been thought to have; by the end of her life, her language skills were roughly equivalent to a young child's, with a vocabulary of around 1,000 signs and the ability to understand 2,000 words of spoken English.
An especially impactful study in 2012 showed that Koko had learned to play the recorder, revealing an ability for voluntary breath control that scientists had previously thought was linked closely to speech and could only be developed by humans. Barbara J. King, a biological anthropologist, suggested that Koko's immersion in a human environment may have helped her develop such a skill, and that it might be misleading to consider similar abilities "innate" or lacking in either humans or non-human primates.
Koko's displays of emotions also fascinated the public, especially those that seemed to closely mirror humans': she cared for pet kittens; appeared on Mr. Rogers' Neighborhood and untied the host's shoes for him; acted playfully with Robin Williams during a visit from him, and later expressed grief when told about the comedian's death. Koko died in her sleep in June 2018, at age 46. Patterson continues to run The Gorilla Foundation, which is dedicated to using inter-species communication to motivate conservation efforts.
4) DOLLY THE SHEEP
Dolly—named after country singer Dolly Parton—was the first mammal ever to be cloned from an adult somatic cell, using the process of nuclear transfer. She was born in 1996 as part of research by scientists Keith Campbell and Ian Wilmut of the University of Edinburgh.
Dolly the cloned sheep.
By taking a donor cell from an adult sheep's mammary gland, using it to replace the cell nucleus of an unfertilized, developing egg cell, and then bringing the resultant embryo to term, Campbell and Wilmut proved that even a mature cell (one that had developed to perform mammary gland functions) could revert to an embryonic state and go on to develop into any and all parts of a mammal.
Although cloned livestock are legal in the U.S.—the FDA approved the practice in 2008, after determining that there was no difference between the meat and milk of cattle, pigs, and goats—Dolly has had an even bigger impact on stem cell research. The successful test of nuclear transfer proved that it was possible to change a cell's gene expression by changing its nucleus.
Japanese stem cell biologist Shinya Yamanaka, inspired by the birth of Dolly, won the Nobel Prize in 2012 for his adaptation of the technique. He developed induced pluripotent stem cells (iPS cells) by chemically reverting mature cells back to an embryonic-like blank state that is highly desirable for disease research and treatment. This technique allows researchers to work with such stem cells without the ethically charged complication of having to destroy a human embryo in the process.
5) LAIKA THE PIG
Named in honor of the dog who made it to space, the second science-famous Laika was a genetically engineered pig born in China in 2015 as a result of gene editing carried out by Cambridge, MA startup eGenesis and collaborators.* eGenesis aims to create pigs whose organs—hearts, kidneys, lungs, and more—are safe to transplant into people.
Laika the gene-edited pig.
Using animal organs in humans (xenotransplantation) is tricky: the immune system is very good at recognizing interlopers, and the human body can start to reject an organ from another species in as little as five minutes. But pigs are otherwise exceptionally good potential donors for humans: their organs' sizes and functions are very similar, and their quick gestation and maturation make them attractive from an efficiency standpoint, given that twenty Americans die every day waiting for organ donors.
Perhaps unsurprisingly, Dolly the sheep helped move xenotransplantation forward. In the 1990s, immunologist David Sachs was able to use a similar cloning method to eliminate alpha-gal, an enzyme that is produced by most animals with immune systems, including pigs—but not humans. Since our immune systems don't recognize alpha-gal, attacks on that enzyme are a major cause of organ rejection. Sachs' experiments increased the survival time of pig organs in primates to weeks: a huge improvement, but not nearly enough for someone in need of a liver or heart.
The advent of CRISPR technology, and the ability to edit genes, has allowed another leap. In 2015, researchers at eGenesis used targeted gene-editing to eliminate the genes for porcine endogenous retroviruses from pig kidney cells. These viral elements are part of all pigs' genomes and pose a potentially high risk of infecting human cells. (After the HIV/AIDS crisis especially, there was a lot of anxiety about potentially introducing a new virus into the human population.)
The eGenesis lab used nuclear transfer to embed the edited nuclei into egg cells taken from a normal pig; and Laika was born months later—without the dangerous viral genes. eGenesis is now working to make the organs even more humanlike, with the goal of one day providing organs to every human patient in need.
*[Disclosure: In 2019, eGenesis received a series B investment from Leaps By Bayer, the funding sponsor of leapsmag. However, leapsmag is editorially independent of Bayer and is under no obligation to cover companies they invest in.]
[Correction, March 3, 2020: Laika the gene-edited pig was born in China, not Cambridge, and eGenesis is pursuing xenotransplant programs that include heart, kidney, and lung, but not skin, as originally written.]