These 7 anti-science myths threaten modern-day society

Everyone is entitled to their own opinions, but no one is entitled to their own facts. What’s amazing about this statement is that it shouldn’t be controversial in any way, and yet many of us routinely find ourselves arguing with people who have rejected well-established scientific facts. With many prominent and popular voices in our culture espousing narratives that undermine and oppose what is actually known — what’s been touted as the rise of alternative facts — it’s important to stand up for the truth, no matter how unpopular it becomes to do so.

While embracing a number of absurd positions may provide entertainment to many, whether arguing that the Earth is flat, humans never landed on the Moon, or that Australia doesn’t exist, they increase misinformation and make it more difficult to take collective action against the very real problems facing our society today. Many of civilization’s greatest successes have come from realistically assessing our dilemmas and tackling them, but that can only occur if we all begin on the same factual footing. In particular, there are seven anti-science myths we all need to be fighting against today.

Planet Earth, as viewed by NASA’s Messenger spacecraft as it departed from our location, clearly shows the spheroidal nature of our planet. This is an observation that cannot be made from a single vantage point on our surface, but there are many valid ways to measure the curvature of the Earth, all leading to the same conclusion. There is no scientifically valid test that can be performed that supports a flat Earth over a round one, providing justification for the scientific consensus position concerning the shape of the Earth.

The problem originates with how we see ourselves. Most of us see ourselves as human: capable of making errors, of being misinformed, and of not having the same level-of-knowledge as an expert in their field. Yet this presumes that our own image of ourselves — our self-identity, if you will — isn’t bound up with our interest in one particular conclusion being vindicated. As Carl Sagan so presciently put it:

“One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.”

As much as we hate to acknowledge it, many of the once-viable ideas that are swimming around in the memory banks of our brains have long since been discredited and ruled out by science. Here, in particular, are seven myths that we all need to unlearn, or overcome, for ourselves.

Flossing in between your teeth, up under the gumline, can remove plaque, bits of food, and bacteria where toothbrushes cannot reach. No large-scale, double blind research trials have been conducted on flossing, as putting people into a “do not floss” group would be an unethical experiment to perform on their oral health.

1.) If something wasn’t established in a peer reviewed, double-blind study, it hasn’t been robustly established. If there’s a subtle but substantial effect that you want to quantify, a peer reviewed, double-blind study is one of the gold standards for any health or medical inquiry. But if you begin your study and start noticing an extraordinary prevalence of ill effects among one group — or you know that such a study would produce ill effects among one group in a proposed study — you cannot continue. It would be unethical to do so, and this has happened many times throughout history.

The original study on the use of antisepsis during surgical procedures, performed by Joseph Lister, was aborted after amputating only a few dozen patients: in the “with antisepsis” group, only 15% of patients died after surgery, whereas approximately 50% died in the “without antisepsis” group. It would have been unethical to continue killing people, and antiseptic procedures were rapidly adopted only a few years afterward. Recently, the act of flossing your teeth was incorrectly derided on those very same grounds. In instances where withholding basic medical care would be unethical, we do not perform studies.

A recent, but dubious, study links exposure to fluoridated tap water during pregnancy to lower IQ scores in infants. Several outside experts expressed concern over its methodology and questioned its findings. Fluoride has been added to community water supplies in industrial countries to prevent tooth decay since the 1950s. Very high levels of the mineral have been found to be toxic to the brain, though the concentrations seen in fluoridated tap water are generally deemed safe, and by a large margin.

2.) Fluoridated drinking water offers no health benefits, is unsafe, and causes us to ingest toxic chemicals. If there’s one fear you can play to that’s guaranteed to generate an emotional response, it’s this: that following a certain public health recommendation will potentially cause significant harm or injury to a young, developing child. Although the science is very strong that water fluoridation at the proper levels reduces cavities by about 40% versus unfluoridated drinking water, some activists continue to stoke an unfounded fear that fluoride reduces the IQ of children who ingest it.

Of course, only severely overfluoridated water produces those effects, just like drinking 66 cups of green tea (which contains natural fluoride) per day for years can cause skeletal fluorosis. Communities without water fluoridation, such as Portland, OR, see the negative effects of poor dental health disproportionately affecting poorer families and communities of color. Nevertheless, these false claims about fluoride’s toxicity and incorrectly alleged ineffectiveness continue to hold sway over many, with activist groups like the Fluoride Action Network successfully fear-mongering their way into cultural, but not scientific, relevance.

Grains of the genetically engineered Golden Rice (right), compared to the Vitamin A-deficient white rice (left). Hundreds of thousands of children per year, worldwide, on primarily rice diets, go blind from lack of Vitamin A, with even greater numbers dying from it outright. Golden Rice could cure that problem. Scientists, but also many other professionals in public health, marketing, politics, and more are needed to transform this scientific solution into a practical solution, as misinformed advocates frequently and vociferously oppose this life-saving measure.

3.) Organic and non-GMO crops are healthier and more nutritious for human beings than their non-organic or GMO counterparts. There are many reasons to support better, more diverse, more sustainable farming and agricultural practices. There are excellent studies on soil depletion, the problems associated with monoculture crops, the fact that our fruits and vegetables have lower micronutrient densities than they did decades ago, etc. In many ways, agricultural science is advancing, and it is the great hope among many that large-scale food production will undergo a revolution in the coming years.

But that doesn’t mean that genetically modified organisms (GMOs) are nutritionally inferior to non-GMO plants. Nor does it mean that foods that are certified organic are more nutritious than their non-organic counterparts. In fact, not only do scientific studies show that nutrient densities are no lower for GMOs or non-organic foods than for non-GMOs or organic foods, but that many nutrient deficiencies can be undone by switching to certain genetically modified crops, such as golden rice, which supplies vitamin A. Contrary to the popular narrative, GMOs could save more than a million lives and spare approximately ~500,000 children from going blind on an annual basis.

Although there are seasonal variations in global carbon dioxide levels at about the ±3 parts-per-million level, the long-term trend has been a rise in carbon dioxide concentration in Earth’s atmosphere. Although the average rise has been about 2 ppm per year from the late 20th-century onward, the rate of carbon emissions has increased with time.

4.) Human emissions of greenhouse gases aren’t necessarily responsible for global climate change. The science linking human-created greenhouse gases, like carbon dioxide, to an increase in the global average temperature has been around for a very long time: more than a century. The first detailed climate model is more than 50 years old, and its large-scale predictions are still valid today. The facts are very simple: a doubling of CO2 concentration leads to a global atmospheric temperature rise of ~2 °C (~3.6 °F), and that since the start of the industrial revolution, human activity has raised our CO2 concentration by a little more than 50%. The observed temperature rise is consistent with that.

And yet, people’s partisanship is a far more decisive factor in determining whether they accept the science surrounding global warming and global climate change than any set of knowledge or understanding about science. The Earth is warming at unprecedented rates; although the climate does change naturally, the changes we’re seeing today are a consequence of human activity. It isn’t the Sun, it isn’t volcanoes, it isn’t any combination of natural causes. This is one scientific fact, like the fact that cigarette smoking is bad for your health, that we cannot politicize away.

A child receives a polio vaccine drop in Gwalior, India, to reduce the risk of contracting and spreading the disease. Misinformation and anti-vaccine propaganda, spurred on largely by concern trolls and untrue information, continues to drive vaccine hesitancy and amplify the spread of preventable diseases.

5.) The CDC’s recommended vaccine schedule is not safe, not effective, and can cause adverse health effects. Vaccinations have been rated by many organizations, such as the World Health Organization and the Centers for Disease Control, as perhaps the greatest public health achievement of the 20th century. Diseases that once ran rampant, killing significant percentages of the population and permanently injuring significantly more, have been nearly eradicated from humanity. Measles, mumps, polio, chickenpox, pertussis, diphtheria, and many other illnesses have been almost eliminated entirely.

A large vaccinated population also serves to protect the young, the immunocompromised, and those who did not obtain immunity from the vaccine. Where the illness is not present in the population, it cannot spread to otherwise vulnerable individuals.

Except, of course, in regions where a significant fraction of the people have rejected vaccination for non-medical reasons. Despite the overwhelming scientific evidence that vaccines are safe, effective, and do not cause autism, along with enormous transparency of the vaccine approval process, many remain fearful of potential vaccine side-effects. Meanwhile, vaccine-preventable illnesses, including measles, have undergone a recent resurgence, and a substantial fraction of Americans remain resistant to even the possibility of taking a vaccine against the novel coronavirus: the deadliest pandemic of the 21st century so far.

Despite a variety of conspiratorial claims to the contrary, 5G cell towers, which this previous 4G tower in Orem, Utah, was being upgraded to at the time this 2021 photo was taken, pose no danger to human or animal health. In particular, they do not cause cancer, mind control, or spread COVID-19. A few years ago, this (now-obvious) conspiracy theory was taken seriously by millions of advocates across the planet, and no doubt the next upgrade, to the 6G standard, will bring about the same fundamentally anti-science claims.

6.) 5G radiation is harmful to humans, and can cause a myriad of negative health effects. This, again, is a case where “fear of the unknown” dominates the public discourse, despite the science being very strong against any evidence for cancers, brain tumors, cellular stress, free radicals, genetic damage, changes in memory or reproduction, or neurological disorders. Classified as “possibly carcinogenic” by the WHO, radiofrequency (RF) radiation — of which 5G is an example — has the same risk level as drinking coffee, seasoning your food with thyme, or holding a U.S. nickel in the palm of your hand.

And yet the science remains very clear:

• this radiation is non-ionizing,
• there have been no ill effects among RF workers who receive the greatest exposure,
• there have been no increases in brain tumor frequency since the advent of cellphones,
• and no health problems of any type have been linked to 5G or RF radiation in general with any significant degree of confidence.

And yet, a few conspiracy-minded scientists have stoked public fear of this technology and associated ones for many years, convincing many. The fact is that the science does not support any dangers arising from 5G, and no amount of fear-mongering will change that conclusion.

A typical example of a scene at a fur farm, showing human-animal contact. Animals are often killed en masse prior to them being skinned by hand at a pelt or fur farm. This industry is a $61 billion per year enterprise in China alone, and is a prime candidate for the zoonotic spillover of SARS-CoV-2 into humans that occurred at the Huanan Wet Market in China.

7.) The virus that causes COVID-19, SARS-CoV-2, was engineered by humans in a Chinese lab. This is perhaps the saddest item on the list. Over the last five years, the world has had to reckon with the emergence of a novel, deadly, infectious respiratory disease, resulting in billions of infections, millions of deaths, and hundreds of millions of long-term illnesses and disabilities. The scientific evidence that has been collected so far is overwhelming: that the virus arose in nature, was transmitted to humans through unsafe and illegal activity in a wet market in Wuhan, and took off from that ground-zero event to launch the coronavirus pandemic.

And yet, a completely unsupported-by-the-evidence narrative, again, almost solely driven by political whims and ideologies, has emerged: that evil scientists performed gain-of-function research on a pre-existing virus to create SARS-CoV-2, which then was transmitted to humans thereafter. There remains no evidence that any such research was ever performed, covered up, destroyed, or that infections arose from such an event, and yet a mountain of evidence has emerged for the mainstream picture: zoonotic spillover. This type of fear-mongering paints the scientists who are working in disease ecology and pandemic prevention, the real heroes of the coronavirus story, as the villains who must be stopped. These types of blatant untruths, now known as “alternative facts,” makes us all less resilient against the very real problems we face here on Earth.

This color-coded diagram represents 15 recombinant fragments of various SARS-related beta coronaviruses compared to the original genome of SARS-CoV-2 that first infected humans. Several different strains show a “best match” for a variety of these 15 fragments, indicating a recombination-based origin for SARS-CoV-2, and refuting the feasibility of a lab creation through gain-of-function research.

The most frustrating thing about science denial is that it’s completely avoidable. We wouldn’t have this problem if we chose to ask questions like, “What does the science say?” rather than, “What do the people whose views I like say?” We all know that the Earth is round, humans have walked on the Moon, and that Australia exists; we can all wink and smile and laugh at those who espouse otherwise.

But we continue to deny a number of issues that are just as scientifically sound. We know that fluoridated drinking water offers substantial benefits and no harm. We’ve determined that organic and non-GMO crops are no healthier than non-organic and/or GMO crops. We’ve clearly established that greenhouse gas emissions really are driving global climate change, that vaccinations are a safe, effective, and successful public health intervention, and that 5G is safe for humans and causes no ill health effects.

There is a health crisis in this country, but it isn’t due to poor behavioral choices. There are people in dire need of medical care and of public health interventions that simply aren’t receiving the assistance they need. Worst of all, charlatans and ideologues are being placed in positions of power. In the places where scientifically true information is needed the most, we’re instead being force-fed a modern version of Lysenko-ism, to the detriment of us all. If you care at all about the health, safety, and welfare of others, you’ll demand that we all accept what’s scientifically known as our factual starting point. Anything less is simply surrendering to, as Carl Sagan put it, the bamboozle.

This article was first published in December of 2020. It was updated in February of 2025.