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These clashing perspectives are reflected in the perennial conflict between two dieting dicta: 1) avoid temptation and 2) don't make yourself feel deprived. There is some truth to both views. 

researchers were also able to activate the mitochondrial UPR via pharmacological means. Dosing worms with the antibiotic doxycyline, which inhibits bacterial and mitochondrial protein translation, also activated the mitochondrial UPR and extended worm lifespans. Rapamycin, shown to enhance longevity in mice, also extended worm lifespan and induced mitonuclear protein imbalance and the mitochondrial UPR in mouse hepatocytes.

mitochondrial ribosomal proteins are not to be trifled with. “There are a number of well-defined severe disorders in humans, including neonatal lethality, due to defects in those exact proteins,”

is beginning to cast a wider net, looking to see whether mitonuclear protein imbalance could explain longevity induced by other means, such as caloric restriction. Auwerx hopes that the work will aid in designing a drug intervention “to pump up this response via pharmacological tools.”

he’s optimistic that his team has identified a “common thread” demonstrating that longevity is not affected so much by inhibiting or stimulating mitochondria, but how the organelles “deal with proteins.”

“Many other studies have shown an association between obesity and an increased risk of dementia. These findings demonstrate the complexity of research into risk factors for dementia and it is important to note that BMI is a crude measure – not necessarily an indicator of health. It’s also not clear whether other factors could have affected these results.”

The best protection against dementia, he added, is “eating a healthy, balanced diet, exercising regularly, not smoking, and keeping blood pressure in check”.

New research suggests that one possible answer can be found in the brain’s so-called central executive network, which helps regulate emotions, thinking and behavior

used M.R.I. to study the brains of a racially diverse group of 218 people, ages 12 to 14, living in violent neighborhoods in Chicago

the youths who had higher levels of functional connectivity in the central executive network had better cardiac and metabolic health than their peers with lower levels of connectivity

when neighborhood homicide rates went up, the young people’s cardiometabolic risk — as measured by obesity, blood-pressure and insulin levels, among other variables — also increased, but only in youths who showed lower activity in this brain network

“Active resilience happens when people who are vulnerable find resources to cope with stress and bounce back, and do so in a way that leaves them stronger, ready to handle additional stress, in more adaptive ways.”

the more medically hardy young people were no less anxious or depressed than their less fortunate peers, which suggests that while being more resilient makes you less vulnerable to adversity, it doesn’t guarantee happiness — or even an awareness of being resilient.

there is good reason to believe the link may be causal because other studies have found that we can change the activity in the self-control network, and increase healthy behaviors, with simple behavioral interventions

One plausible explanation is that greater activity in this network increases self-control, which most likely reduces some unhealthy behaviors people often use to cope with stress, like eating junk food or smoking

n one study, two weeks of mindfulness training produced a 60 percent reduction in smoking, compared with no reduction in a control group that focused on relaxation. An M.R.I. following mindfulness training showed increased activity in the anterior cingulate cortex and prefrontal cortex, key brain areas in the executive self-control network

Clearly self-control is one critical component of resilience that can be easily fostered. But there are others.

For example, mindfulness training, which involves attention control, emotion regulation and increased self-awareness, can increase connectivity within this network and help people to quit smoking.

she and colleagues studied the brains of depressed patients who died. They found that the most disrupted genes were those for growth factors, proteins that act like a kind of brain fertilizer.

“We came to realize that depressed people have lost their power to remodel their brains. And that is in fact devastating because brain remodeling is something we need to do all the time — we are constantly rewiring our brains based on past experience and the expectation of how we need to use them in the future,

one growth factor that is depleted in depressed brains, called fibroblast growth factor 2, also plays a role in resilience. When they gave it to stressed animals, they bounced back faster and acted less depressed. And when they gave it just once after birth to animals that had been bred for high levels of anxiety and inhibition, they were hardier for the rest of their lives.

The good news is that we have some control over our own brain BDNF levels: Getting more physical exercise and social support, for example, has been shown to increase BDNF.

Perhaps someday we might be able to protect young people exposed to violence and adversity by supplementing them with neuroprotective growth factors. We know enough now to help them by fortifying their brains through exercise, mindfulness training and support systems

Some people have won the genetic sweepstakes and are naturally tough. But there is plenty the rest of us can do to be more resilient and healthier.

Suicide rates are now at a 30-year high. Depression rates have increased tenfold since 1960, which is not only a result of greater reporting.

Most children born to mothers under 30 are born outside of marriage.

There’s been a steady 30-year decline in Americans’ satisfaction with the peer-to-peer relationships at work.

“During my years caring for patients, the most common pathology I saw was not heart disease or diabetes; it was loneliness.”

Weak social connections have health effects similar to smoking 15 cigarettes a day, and a greater negative effect than obesity, he said.

In 2012, 5.9 percent of young people suffered from severe mental health issues. By 2015 it was 8.2 percent.

More and more Americans are socially poor. And yet it is very hard for the socially wealthy to even see this fact.

Most of the questions he faced at the congressional hearings and most of the analysis in the press were about Facebook’s failure to protect privacy. That’s the sort of thing that may be uppermost on your mind if you are socially wealthy

But the big issue surrounding Facebook is not privacy. It’s that Facebook and other social media companies are feeding this epidemic of loneliness and social isolation.

heavy internet users are much less likely to have contact with their proximate neighbors to exchange favors and extend care. There’s something big happening to the social structure of neighborhoods.

The British anthropologist Robin Dunbar observes that human societies exist on three levels: the clan (your family and close friends), the village (your local community) and the tribe (your larger group)

In America today you would say that the clans have polarized, the villages have been decimated and the tribes have become weaponized.

That is, some highly educated families have helicopter parents while less fortunate families have absent parents. The middle ring cross-class associations of town and neighborhood have fallen apart. People try to compensate for the lack of intimate connection by placing their moral and emotional longings on their political, ethnic and other tribes, turning them viciously on each other.

many of us who are socially wealthy don’t really know how the other half lives.

As a result, our microbiomes are better at helping us store fat than those of our ancestors.

Antibiotics aren’t the only force shifting our internal ecology. Modern diets are full of processed foods and low in fiber, the kind of hard-to-break-down carbohydrates found especially in vegetables, legumes, and whole grains that are crucial for a healthy microbiome.

The vast majority of our internal microbes live in the far reaches of our digestive tract, the colon, explains Justin Sonnenburg, an associate professor of microbiology and immunology at Stanford. Because of their location, these microscopic critters “really only get access to the dregs of what we eat”—the dietary fiber that our organs can’t digest. The microbes have evolved to process that fiber by fermenting it with enzymes.

feeding this fermentation process appears to be crucial for averting weight gain and diseases like obesity and Type 2 diabetes

fiber supplements might also trigger liver cancer.

“Right now, the only useful advice I could give somebody would be to eat foods naturally rich in fiber,” he says, like bran cereal and every kind of bean you can think of. Other winners included pears, avocados, apples, seeds, and nuts.

The Institute of Medicine recommends that women eat 25 grams and men 38 grams of fiber every day, but Americans only get about 15 grams on average.

The choice of whether to lunch on a cup of black beans or five chicken nuggets—which both contain about 220 calories—just got a whole lot easier.

“My definition of addiction is a repetitive behavior that some people find difficult to quit,”

Mr. Szymanczyk was speaking in the context of smoking. But a fascinating new book by Michael Moss, an investigative journalist and best-selling author, argues that the tobacco executive’s definition of addiction could apply to our relationship with another group of products that Philip Morris sold and manufactured for decades: highly processed foods.

In his new book, “Hooked,” Mr. Moss explores the science behind addiction and builds a case that food companies have painstakingly engineered processed foods to hijack the reward circuitry in our brains, causing us to overeat and helping to fuel a global epidemic of obesity and chronic disease.

Mr. Moss suggests that processed foods like cheeseburgers, potato chips and ice cream are not only addictive, but that they can be even more addictive than alcohol, tobacco and drugs.

In another cynical move, Mr. Moss writes, food companies beginning in the late 1970s started buying a slew of popular diet companies, allowing them to profit off our attempts to lose the weight we gained from eating their products.

Heinz, the processed food giant, bought Weight Watchers in 1978 for $72 million. Unilever, which sells Klondike bars and Ben & Jerry’s ice cream, paid $2.3 billion for SlimFast in 2000. Nestle, which makes chocolate bars and Hot Pockets, purchased Jenny Craig in 2006 for $600 million. And in 2010 the private equity firm that owns Cinnabon and Carvel ice cream purchased Atkins Nutritionals, the company that sells low-carb bars, shakes and snacks. Most of these diet brands were later sold to other parent companies.

“The food industry blocked us in the courts from filing lawsuits claiming addiction; they started controlling the science in problematic ways, and they took control of the diet industry,”

“I’ve been crawling through the underbelly of the processed food industry for 10 years and I continue to be stunned by the depths of the deviousness of their strategy to not just tap into our basic instincts, but to exploit our attempts to gain control of our habits.”

The book explained how companies formulate junk foods to achieve a “bliss point” that makes them irresistible and market those products using tactics borrowed from the tobacco industry.

In the 1980s, Philip Morris acquired Kraft and General Foods, making it the largest manufacturer of processed foods in the country, with products like Kool-Aid, Cocoa Pebbles, Capri Sun and Oreo cookies.

“I had tried to avoid the word addiction when I was writing ‘Salt Sugar Fat,’” he said. “I thought it was totally ludicrous. How anyone could compare Twinkies to crack cocaine was beyond me.”

Witness

But as he dug into the science that shows how processed foods affect the brain, he was swayed

One crucial element that influences the addictive nature of a substance and whether or not we consume it compulsively is how quickly it excites the brain.

The faster it hits our reward circuitry, the stronger its impact.

That is why smoking crack cocaine is more powerful than ingesting cocaine through the nose, and smoking cigarettes produces greater feelings of reward than wearing a nicotine patch

: Smoking reduces the time it takes for drugs to hit the brain.

But no addictive drug can fire up the reward circuitry in our brains as rapidly as our favorite foods, Mr. Moss writes. “The smoke from cigarettes takes 10 seconds to stir the brain, but a touch of sugar on the tongue will do so in a little more than a half second, or six hundred milliseconds, to be precise,

This puts the term “fast food” in a new light. “Measured in milliseconds, and the power to addict, nothing is faster than processed food in rousing the brain,” he added.

Mr. Moss explains that even people in the tobacco industry took note of the powerful lure of processed foods.

In “Hooked,” Michael Moss explores how no addictive drug can fire up the reward circuitry in our brains as rapidly as our favorite foods.

As litigation against tobacco companies gained ground in the 1990s, one of the industry’s defenses was that cigarettes were no more addictive than Twinkies.

It may have been on to something.

“Smoking was given an 8.5, nearly on par with heroin,” Mr. Moss writes. “But overeating, at 7.3, was not far behind, scoring higher than beer, tranquilizers and sleeping pills.

But processed foods are not tobacco, and many people, including some experts, dismiss the notion that they are addictive. Mr. Moss suggests that this reluctance is in part a result of misconceptions about what addiction entails.

For one, a substance does not have to hook everyone for it to be addictive.

Studies show that most people who drink or use cocaine do not become dependent

Nor does everyone who smokes or uses painkillers become addicted.

Mr. Moss said that people who struggle with processed food can try simple strategies to conquer routine cravings, like going for a walk, calling a friend or snacking on healthy alternatives like a handful of nuts. But for some people, more extreme measures may be necessary.

“It depends where you are on the spectrum,” he said. “I know people who can’t touch a grain of sugar without losing control. They would drive to the supermarket and by the time they got home their car would be littered with empty wrappers. For them, complete abstention is the solution.”

“Individuals with obesity were impacted the most — and that’s what we were afraid of,”

“We were feeding the soul more than feeding the stomach,”

“We were making sure to eat things that made us feel better — not just nutritional items.

Now a global survey conducted earlier this year confirms what Mr. Loy and many others experienced firsthand: The coronavirus pandemic and resulting lockdowns led to dramatic changes in health behaviors, prompting people around the world to cut back on physical activity and eat more junk foods.

While they tended to experience improvements in some aspects of their diets, such as cooking at home more and eating out less, they were also the most likely to report struggling with their weight and mental health.

With months to go before a vaccine becomes widely available and we can safely resume our pre-pandemic routines, now might be a good time to assess the healthy habits we may have let slip and to find new ways to be proactive about our physical and mental health.

The researchers found that the decline in healthy behaviors during the pandemic and widespread lockdowns was fairly common regardless of geography.

Alone

But that all changed when the pandemic struck. During the lockdowns, when he was stuck at home, his anxiety levels went up. He stopped exercising and started stress eating. Gone were the hummus and vegetables; instead, he snacked on cookies, sweets and Lay’s potato chips. He ate more fried foods and ordered takeout from local restaurants.

“They not only started off with higher anxiety levels before the pandemic, but they also had the largest increase in anxiety levels throughout the pandemic.”

The pandemic disrupted everyday life, isolated people from friends and family, and spawned an economic crisis, with tens of millions of people losing jobs or finding their incomes sharply reduced.

despite snacking on more junk foods, many people showed an increase in their “healthy eating scores,” a measure of their overall diet quality, which includes things like eating more fruits and fewer fried foods.

The researchers said that the overall improvements in diet appeared to be driven by the fact that the lockdowns prompted people to cook, bake and prepare more food at home.

Other recent surveys have also shown a sharp rise in home cooking and baking this year, with many people saying they are discovering new ingredients and looking for ways to make healthier foods.

But social isolation can take a toll on mental wellness, and that was evident in the findings.

About 20 percent said that their symptoms, such as experiencing dread and not being able to control or stop their worrying, were severe enough to interfere with their daily activities.

Dr. Flanagan said it was perhaps not surprising that people tended to engage in less healthful habits during the pandemic, as so many aspects of health are intertwined.

Stress can lead to poor sleep, which can cause people to exercise less, consume more junk foods, and then gain weight, and so on.

But she said she hoped that the findings might inspire people to take steps to be more proactive about their health, such as seeking out mental health specialists, prioritizing sleep and finding ways to exercise at home and cook more, in the event of future lockdowns.

“Being aware is really the No. 1 thing here.”

Oversleeping — typically defined as more than nine or 10 hours in research studies — is associated with certain health risks, including stroke, obesity, depression, diabetes, heart disease and dementia. However, it’s not clear if oversleeping causes these conditions or if it’s just an indicator that something else is wrong.

“In other words, we don’t know if it’s the long sleep that’s causing problems over time, or if some underlying health problem is causing someone to sleep longer,”

“If someone seems to be an unusually long sleeper, it’s possible that they are simply wired to need more sleep,” Wu said. (That said, it can’t hurt to mention it to your doctor if you have some concerns.)

“A number of factors, such as medical conditions, medication side effects, and undiagnosed sleep disorders, can lead to poor sleep quality and non-restful sleep,” she added.

if sleep quantity isn’t the issue, then sleep quality probably is. Conditions like sleep apnea can disrupt sleep and leave you feeling fatigued even after spending ample time in bed.

“Poor quality sleep means that an individual does not get to the deeper stages of sleep or REM sleep, which restore the brain and body and makes you feel refreshed and rejuvenated the next day,”

“Get lots of sunlight, get physically active — or at least decrease long stretches of sitting — and go out of your way to plan some fun and social activities,” Wu said. “Make efforts to prioritize physical and mental health. You may find yourself waking up with more energy after making these changes.”

Our previous work has shown that ACTN3 variants play an important role in our muscle’s ability to generate strength. We showed that the loss of alpha-actinin-3 is detrimental to sprint performance in athletes and the general population, but may benefit muscle endurance.

This is because the loss of alpha-actinin-3 causes the muscle to behave more like a slower muscle fibre.

Our study shows that ACTN3 is more than just the “gene for speed”, but that its loss improves our muscle’s ability to generate heat and reduces the need to shiver when exposed to cold.

The goal of our research is to improve our understanding of how our genetics influence how our muscle works. This will allow us to develop better treatments for those who suffer from muscle diseases, like Duchenne muscular dystrophy, as well as more common conditions, such as obesity and type 2 diabetes.

“I heard a lot from friends in Miami about people flying in, because they were giving it to everybody,”

, it began to seem like anyone could get a vaccine if they were willing to hunt one down or stretch the truth about their medical history.

“the equivalent of knocking over an old lady for a taxi and feeling good about yourself,” as she put it in an interview.

“It’s broadcasting status, that you got the vaccine ahead of others,”

“We should all consider taking up the Garbo challenge and stay off social media for a spell instead of broadcasting every waking second of the day, including your vax shot.”

Those people seemed just fine when they were splashing in bikinis in Turks and Caicos at Christmas,

Occasionally, those posting on Instagram have said that they were trying to say to others that the vaccine is safe and effective

“On some level, they know it’s tone-deaf for a wide audience but have their group where they feel safe,”

“What’s funny is that many of them just post their vaccination selfies to green circle Close Friends.”

“I mean, come on. You’re not Joe Biden. You’re not the queen,”

Three psychiatrists interviewed for this article said their patients all seemed to understand that attention deficit disorder and mild anxiety do not meet the state definition of an “intellectual” or “developmental” disorder sufficient to place them in the Centers for Disease Control and Prevention’s

“I have patients who brought stacks of medical info when they went to get vaccinated. No one ever asks to see it.”

“I’ve never had so many people happy to be told they’re obese,”

“At this point, the goal is to get as many people vaccinated as possible,”

He sees no issue with giving a note to a patient who had a melanoma five years back. Cancer is cancer. Elevated blood pressure is fine too, even if it’s sometimes less a reason than an excuse.

“Young people are the super-spreaders!

Some young people get around the fauxmorbidity issue by volunteering at a vaccine site.

. “It was basically treated as a given when I got there,”

“I get that people are eager to shame those who are gaming the system,” she said, “but let’s shame the people who set up that system.”

Although it is at pains to point out that it does not believe language can be preserved unchanged, it worries that communication is at risk of becoming far less effective. “Some changes would be wholly unacceptable, as they would cause confusion and the language would lose shades of meaning

“Without grammar, we lose the agreed-upon standards about what means what. We lose the ability to communicate when respondents are not actually in the same room speaking to one another. Without grammar, we lose the precision required to be effective and purposeful in writing.”

At the same time, our laziness and imprecision are leading to unnecessary bloating of the language – “language obesity,”

That’s five writers, across a span of 400 years, all moaning about the same erosion of standards. And yet the period also encompasses some of the greatest works of English literature.

Since then, the English-speaking world has grown more prosperous, better educated and more efficiently governed, despite an increase in population. Most democratic freedoms have been preserved and intellectual achievement intensified.

Linguistic decline is the cultural equivalent of the boy who cried wolf, except the wolf never turns up

Our language will always be as flexible and sophisticated as it has been up to now. Those who warn about the deterioration of English haven’t learned about the history of the language, and don’t understand the nature of their own complaints – which are simply statements of preference for the way of doing things they have become used to.

But the problem is that writers at that time also felt they were speaking a degraded, faltering tongue

Seventy-odd years ago, people knew their grammar and knew how to talk clearly. And, if we follow the logic, they must also have been better at organising, finding things out and making things work.

Hand-wringing about standards is not restricted to English. The fate of every language in the world has been lamented by its speakers at some point or another.

“For more than 2,000 years, complaints about the decay of respective languages have been documented in literature, but no one has yet been able to name an example of a ‘decayed language’.” He has a point.

One common driver of linguistic change is a process called reanalysis.

Another form that linguistic change often takes is grammaticalisation: a process in which a common phrase is bleached of its independent meaning and made into a word with a solely grammatical function

One instance of this is the verb “to go”, when used for an action in the near future or an intention.

Human anatomy makes some changes to language more likely than others. The simple mechanics of moving from a nasal sound (m or n) to a non-nasal one can make a consonant pop up in between

The way our brain divides up words also drives change. We split them into phonemes (building blocks of sound that have special perceptual significance) and syllables (groups of phonemes).

ound changes can come about as a result of social pressures: certain ways of saying things are seen as having prestige, while others are stigmatised. We gravitate towards the prestigious, and make efforts to avoid saying things in a way that is associated with undesirable qualities – often just below the level of consciousnes

The problem arises when deciding what might be good or bad. There are, despite what many people feel, no objective criteria by which to judge what is better or worse in communication

Though we are all capable of adaptation, many aspects of the way we use language, including stylistic preferences, have solidified by our 20s. If you are in your 50s, you may identify with many aspects of the way people spoke 30-45 years ago.

The irony is, of course, that the pedants are the ones making the mistakes. To people who know how language works, pundits such as Douglas Rushkoff only end up sounding ignorant, having failed to really interrogate their views

Other researchers reported a consistent association between family dinner frequency and teen academic performance. Adolescents who ate family meals 5 to 7 times a week were twice as likely to get A’s in school as those who ate dinner with their families fewer than two times a week.

Children who eat regular family dinners also consume more fruits, vegetables, vitamins and micronutrients, as well as fewer fried foods and soft drinks.

And the nutritional benefits keep paying dividends even after kids grow up: young adults who ate regular family meals as teens are less likely to be obese and more likely to eat healthily once they live on their own.

Some research has even found a connection between regular family dinners and the reduction of symptoms in medical disorders, such as asthma.

The benefit might be due to two possible byproducts of a shared family meal: lower anxiety and the chance to check in about a child’s medication compliance.

The dinner atmosphere is also important. Parents need to be warm and engaged, rather than controlling and restrictive, to encourage healthy eating in their children.

In a very recent study, kids who had been victims of cyberbullying bounced back more readily if they had regular family dinners.

Family dinners have been found to be a more powerful deterrent against high-risk teen behaviors than church attendance or good grades.

In a New Zealand study, a higher frequency of family meals was strongly associated with positive moods in adolescents. Similarly, other researchers have shown that teens who dine regularly with their families also have a more positive view of the future, compared to their peers who don’t eat with parents.

dinner is the most reliable way for families to connect and find out what’s going on with each other

American teens were asked when they were most likely to talk with their parents: dinner was their top answer

Kids who eat dinner with their parents experience less stress and have a better relationship with them

Of course, the real power of dinners lies in their interpersonal quality. If family members sit in stony silence, if parents yell at each other, or scold their kids, family dinner won’t confer positive benefits.

But, dinner may be the one time of the day when a parent and child can share a positive experience – a well-cooked meal, a joke, or a story – and these small moments can gain momentum to create stronger connections away from the table.

But carrying around false memories from your childhood could be having a far greater impact on you than you may realise too. The events, emotions and experiences we remember from our early years can help to shape who we are as adults, determining our likes, dislikes, fears and even our behaviour.

“People have a life story, particularly as they get older and for some people it needs to stretch back to the very early stage of life,”

The prevailing account of how we come to believe and remember things is based around the concept of source monitoring. “Every time a thought comes to mind we have to make a decision – have we experienced it [an event], imagined it or have we talked about it with other people,” says Kimberley Wade

Most of the time we make that decision correctly and can identify where these mental experiences come from, but sometimes we get it wrong.

Wade admits she has spent a lot of time recalling an event that was actually something her brother experienced rather than herself, but despite this, it is rich in detail and provokes emotion

Memory researchers have shown it is possible to induce fictional autobiographical memories in volunteers, including accounts of getting lost in a shopping mall and even having tea with a member of the Royal Family

Based on my research, everybody is capable of forming complex false memories, given the right circumstances – Julia Shaw

In some situations, such as after looking at pictures or a video, children are more susceptible to forming false memories than adults. People with certain personality types are also thought to be more prone.

Experts have managed to turn people off all sorts of foods by convincing them it had made them ill when they were a child

Memories before the age of three are more than likely to be false. Any that appear very fluid and detailed, as if you were playing back a home video and experiencing a chronological account of a memory, could well also be made up. It is more likely that fuzzy fragments, or snapshots of moments are real, as long as they are not from too early in your life.

While this may seem like a bit of fun, many scientists believe the “false memory diet” could be used to tackle obesity and encourage people to reach for healthier options like asparagus, or even help cut people’s alcohol consumption.

Interestingly, scientists have also found positive suggestions, such as “you loved asparagus the first time you ate it” tend to be more effective than negative suggestions like “you got sick drinking vodka”

“Miscarriage of justice, incarceration, loss of reputation, job and status, and family breakdown occur,

One of the major problems with legal cases involving false memories, is that it is currently impossible to distinguish between true and fictional recollections

Efforts have been made to analyse minor false memories in a brain scanner (fMRI) and detect different neurological patterns, but there is nothing as yet to indicate that this technology can be used to detect whether recollections have become distorted.

the most extreme case of memory implantation involves a controversial technique called “regression therapy”, where patients confront childhood traumas, supposedly buried in their subconscious

“Memories are malleable and tend to change slightly each time we revisit them, in the same way that spoken stories do,”

“Therefore at each recollection, new elements can easily be integrated while existing elements can be altered or lost.”

This is not to say that all evidence that relies on memory should be discarded or regarded as unreliable – they often provide the most compelling testimony in criminal cases. But it has led to rules and guidelines about how witnesses and victims should be questioned to ensure their recollections of an event or perpetrator are not contaminated by investigators or prosecutors.

Any memories that appear very fluid and detailed, as if you were playing back a home video, could well also be made up

We crave a cohesive narrative of our own existence and will even invent stories to give us a more complete picture

Children are more susceptible to forming false memories than adults, especially after looking at photographs or films

And we may not want to rid ourselves of these memories. Our memories, whether fictional or not, can help to bring us closer together.

"If you're Latino, you'll get less pain medication than a white patient. If you're an elderly woman, you'll receive fewer life-saving interventions than an elderly man. If you're a man being evaluated for a job as a lab manager, you will be given more mentorship, judged as more capable, and offered a higher starting salary than if you were a woman. If you are an obese child, your teacher is more likely to assume you're less intelligent than if you were slim."

"Damn," I thought. "I just racially profiled a black man -- and I'm black!"

The experience didn't just humble me, it scared me. If I -- someone who is black and has read about race and bias for years -- could act like this, what was possible for others who never thought much about these issues?

Perhaps there's another way. Our language and behavior should evolve. We shouldn't talk about racism, for example, as an either/or proposition: Use a slur and you're the Grand Imperial Wizard of the KKK; if you've never used one you're free of intolerance.

Here's a little secret that I think many minorities can identify with. Sure, we get angry when people get caught saying or doing the wrong thing. But we get angrier when others claim they could never be like those people.

One of my best friends is a fellow bigot -- a white minister I've known for years. He freely admits he still struggles with the racism he absorbed growing up in the segregated South.

We should never retreat from calling out the unapologetic cruelty that we see flashed across social media.

In fact, studies demonstrate bias across nearly every field and for nearly every group of people. If you’re Latino, you’ll get less pain medication than a white patient. If you’re an elderly woman, you’ll receive fewer life-saving interventions than an elderly man. If you are a man being evaluated for a job as a lab manager, you will be given more mentorship, judged as more capable, and offered a higher starting salary than if you were a woman. If you are an obese child, your teacher is more likely to assume you’re less intelligent than if you were slim. If you are a black student, you are more likely to be punished than a white student behaving the same way.

Mike Pence, for instance, bristled during the 2016 vice-presidential debate: “Enough of this seeking every opportunity to demean law enforcement broadly by making the accusation of implicit bias whenever tragedy occurs.” And two days after the first presidential debate, in which Hillary Clinton proclaimed the need to address implicit bias, Donald Trump asserted that she was “essentially suggesting that everyone, including our police, are basically racist and prejudiced.”

Still other people, particularly those who have been the victims of police violence, also reject implicit bias—on the grounds that there’s nothing implicit about it at all.

Bias is woven through culture like a silver cord woven through cloth. In some lights, it’s brightly visible. In others, it’s hard to distinguish. And your position relative to that glinting thread determines whether you see it at all.

All of which is to say that while bias in the world is plainly evident, the exact sequence of mental events that cause it is still a roiling question.  Devine, for her part, told me that she is no longer comfortable even calling this phenomenon “implicit bias.” Instead, she prefers “unintentional bias.” The term implicit bias, she said, “has become so broad that it almost has no meaning.”

Weeks afterwards, students who had participated noticed bias more in others than did students who hadn’t participated, and they were more likely to label the bias they perceived as wrong. Notably, the impact seemed to last: Two years later, students who took part in a public forum on race were more likely to speak out against bias if they had participated in the training.

This hierarchy matters, because the more central a layer is to self-concept, the more resistant it is to change. It’s hard, for instance, to alter whether or not a person values the environment. But if you do manage to shift one of these central layers, Forscher explained, the effect is far-reaching.

And if there’s one thing the Madison workshops do truly shift, it is people’s concern that discrimination is a widespread and serious problem. As people become more concerned, the data show, their awareness of bias in the world grows, too.

"When people talk about metabolism, they think diet and exercise - but it is deeper than that, we are actually watching your body, your cells, at work," Prof Herman Pontzer, from Duke University, told BBC News."They are incredibly busy at one year old and when we see declines with age, we are seeing your cells stopping working."

Prof Tom Sanders, from King's College London, said: "Interestingly, they found very little differences in total energy expenditure between early adult life and middle age - a time when most adults in developed countries put on weight. "These findings would support the view that the obesity epidemic is fuelled by excess food energy intake and not a decline in energy expenditure."