6 Scientific Explanations for Ghosts

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A surprising number of people believe in ghosts. A 2017 survey by Chapman University found that 52 percent of Americans believe places can be haunted by spirits, an increase of approximately 11 percent since 2015. An earlier UK survey found that 52 percent of participants believed in the supernatural. But there may be a more scientific basis to things that go bump in the night than a restless afterlife.

Here are six logical explanations for that ghostly presence in your house.

1. ELECTROMAGNETIC FIELDS

For decades, a Canadian neuroscientist named Michael Persinger has been studying the effects of electromagnetic fields on people’s perceptions of ghosts, hypothesizing that pulsed magnetic fields, imperceptible on a conscious level, can make people feel as if there is a “presence” in the room with them by causing unusual activity patterns in the brain’s temporal lobes. Persinger has studied people in his lab wearing a so-called “God Helmet,” finding that certain patterns of weak magnetic fields over someone’s head for 15 to 30 minutes can create the perception that there’s an invisible presence in the room.

Some subsequent research has pushed back on this theory, arguing that people were responding to the suggestion that they would feel a ghostly presence, rather than to the electromagnetic field. However, Persinger counters that this experiment followed very different protocols than his own research [PDF]. Other scientists have also found that environments that have a reputation for being haunted often feature unusual magnetic fields.

2. INFRASOUND

Infrasound is sound at levels so low humans can’t hear it (though other animals, like elephants, can). Low frequency vibrations can cause distinct physiological discomfort. Scientists studying the effects of wind turbines and traffic noise near residences have found that low-frequency noise can cause disorientation [PDF], feelings of panic, changes in heart rate and blood pressure, and other effects that could easily be associated with being visited by a ghost [PDF]. For instance, in a 1998 paper on natural causes of hauntings [PDF], engineer Vic Tandy describes working for a medical equipment manufacturer, whose labs included a reportedly haunted room. Whenever Tandy worked in this particular lab, he felt depressed and uncomfortable, often hearing and seeing odd things—including an apparition that definitely looked like a ghost. Eventually, he discovered that the room was home to a 19 Hz standing wave coming from a fan, which was sending out the inaudible vibrations that caused the disorienting effects. Further studies also show links between infrasound and bizarre sensations like getting chills down the spine or feeling uneasy.

3. MOLD

Shane Rogers, an engineering professor at Clarkson University, has spent the past few months touring reportedly haunted locations looking for not-so-paranormal activity: mold growth. Preliminary research indicates that some molds can cause symptoms that sound pretty ghostly—like irrational fear and dementia. “I’ve watched a lot of ghost shows,” he tells Mental Floss. He began to wonder “if there’s some kind of link there, where we might be able to explain why people are having these feelings.” So far in the data collection process, “it’s hard to say whether that’s a contributing factor or not, but anecdotally we are seeing these [toxic molds] exist in places that are haunted," Rogers says.

4. CARBON MONOXIDE POISONING

In 1921, a doctor named W.H. Wilmer published an odd story about a haunted house in the American Journal of Ophthalmology. The family who lived in this haunted residence, called the H family in the medical literature, began experiencing weird phenomena when they moved into an old house—hearing furniture moving around and strange voices in the night, feeling the presence of invisible specters. They report being held down in bed by ghosts, feeling weak, and more. As it turned out, a faulty furnace was filling their house with carbon monoxide, causing aural and visual hallucinations. The furnace was fixed, and the H family went back to their lives, sans ghosts.

5. SOMEONE ELSE SAID IT WAS REAL.

In a 2014 study, Goldsmiths, University of London psychologists had participants watch a video of a “psychic” supposedly bending a metal key with his mind. In one condition, study subjects watched the video with a “participant” who was actually working with the researchers and professed to see the key bending. Those subjects were more likely to report that they saw the key bend than subjects who were paired with someone who asserted that the key didn’t bend or said nothing. “One person’s account can influence another person’s memory,” study co-author Christopher French tells Mental Floss. If someone else confidently asserts that they saw the ghost, it might influence a fellow eyewitness to believe they saw it, too.

6. WE WANT TO BELIEVE.

"There is a motivational side to belief in ghosts,” French explains. “We all want to believe in life after death. The idea of our mortality is one we are not generally comfortable with.” Confirmation bias holds powerful sway over our perceptions. “We find it much easier to believe evidence for something we want to believe anyway,” he says.

6 Facts About International Women's Day

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iStock.com/robeo

For more than 100 years, March 8th has marked what has come to be known as International Women's Day in countries around the world. While its purpose differs from place to place—in some countries it’s a day of protest, in others it’s a way to celebrate the accomplishments of women and promote gender equality—the holiday is more than just a simple hashtag. Ahead of this year’s celebration, let’s take a moment to explore the day’s origins and traditions.

1. International Women's Day originated more than 100 years ago.

On February 28, 1909, the now-dissolved Socialist Party of America organized the first National Woman’s Day, which took place on the last Sunday in February. In 1910, Clara Zetkin—the leader of Germany’s 'Women's Office' for the Social Democratic Party—proposed the idea of a global International Women’s Day, so that people around the world could celebrate at the same time. On March 19, 1911, the first International Women’s Day was held; more than 1 million people in Germany, Switzerland, Austria, and Denmark took part.

2. The celebration got women the vote in Russia.

In 1917, women in Russia honored the day by beginning a strike for “bread and peace” as a way to protest World War I and advocate for gender parity. Czar Nicholas II, the country’s leader at the time, was not impressed and instructed General Khabalov of the Petrograd Military District to put an end to the protests—and to shoot any woman who refused to stand down. But the women wouldn't be intimidated and continued their protests, which led the Czar to abdicate just days later. The provisional government then granted women in Russia the right to vote.

3. The United Nations officially adopted International Women's Day in 1975.

In 1975, the United Nations—which had dubbed the year International Women’s Year—celebrated International Women’s Day on March 8th for the first time. Since then, the UN has become the primary sponsor of the annual event and has encouraged even more countries around the world to embrace the holiday and its goal of celebrating “acts of courage and determination by ordinary women who have played an extraordinary role in the history of their countries and communities.”

4. International Women's Day is an official holiday in dozens of countries.

International Women’s Day is a day of celebration around the world, and an official holiday in dozens of countries. Afghanistan, Cuba, Vietnam, Uganda, Mongolia, Georgia, Laos, Cambodia, Armenia, Belarus, Montenegro, Russia, and Ukraine are just some of the places where March 8th is recognized as an official holiday.

5. It’s a combined celebration with Mother’s Day in several places.

In the same way that Mother’s Day doubles as a sort of women’s appreciation day, the two holidays are combined in some countries, including Serbia, Albania, Macedonia, and Uzbekistan. On this day, children present their mothers and grandmothers with small gifts and tokens of love and appreciation.

6. Each year's festivities have an official theme.

In 1996, the UN created a theme for that year’s International Women’s Day: Celebrating the Past, Planning for the Future. In 1997, it was “Women at the Peace Table,” then “Women and Human Rights” in 1998. They’ve continued this themed tradition in the years since; for 2019, it's “Better the balance, better the world” or #BalanceforBetter.

Presidents Day vs. President's Day vs. Presidents' Day: Which One Is It?

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iStock

Happy Presidents’ Day! Or is it President’s Day? Or Presidents Day? What you call the national holiday depends on where you are, who you’re honoring, and how you think we’re celebrating.

Saying "President’s Day" implies that the day belongs to a singular president, such as George Washington or Abraham Lincoln, whose birthdays are the basis for the holiday. On the other hand, referring to it as "Presidents’ Day" means that the day belongs to all of the presidents—that it’s their day collectively. Finally, calling the day "Presidents Day"—plural with no apostrophe—would indicate that we’re honoring all POTUSes past and present (yes, even Andrew Johnson), but that no one president actually owns the day.

You would think that in the 140 years since "Washington’s Birthday" was declared a holiday in 1879, someone would have officially declared a way to spell the day. But in fact, even the White House itself hasn’t chosen a single variation for its style guide. They spelled it “President’s Day” here and “Presidents’ Day” here.


Wikimedia Commons // Public Domain

Maybe that indecision comes from the fact that Presidents Day isn’t even a federal holiday. The federal holiday is technically still called “Washington’s Birthday,” and states can choose to call it whatever they want. Some states, like Iowa, don’t officially acknowledge the day at all. And the location of the punctuation mark is a moot point when individual states choose to call it something else entirely, like “George Washington’s Birthday and Daisy Gatson Bates Day” in Arkansas, or “Birthdays of George Washington and Thomas Jefferson” in Alabama. (Alabama loves to split birthday celebrations, by the way; the third Monday in January celebrates both Martin Luther King Jr. and Robert E. Lee.)

You can look to official grammar sources to declare the right way, but even they don’t agree. The AP Stylebook prefers “Presidents Day,” while Chicago Style uses “Presidents’ Day.”

The bottom line: There’s no rhyme or reason to any of it. Go with what feels right. And even then, if you’re in one of those states that has chosen to spell it “President’s Day”—Washington, for example—and you use one of the grammar book stylings instead, you’re still technically wrong.

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