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Science

The mood ring's mysterious history: the invention everyone claims but nobody patented

One of the most dramatic oversights in fashion history.

Photo credit: Canva

The mood ring is a cautionary tale.

Every child in elementary school is familiar with the mood ring. With its inscrutable, color-changing stone and cryptic ability to "read" the wearer's emotions, the mood ring has stood as an enigmatic symbol of self-expression since the 1970s.

Yet, ask the average American about what they know about the mood ring, and they might shrug and say that they're a fun piece of jewelry that shifts with the user's emotions. Or, a more astute person might propose that there is some element of body heat technology at play. However, almost no one knows how it all began or the story behind the fight for custody of the mood ring.


Hand, mood ring, emotions, history. Where did the mood ring come from? Photo by No Revisions on Unsplash


Origins

The idea originated with an American jeweler named Marvin Wenick, who first conceived of the idea after coming across a magazine article in 1974 about the liquid crystal elements found in thermometers. Fascinated, he quickly developed a compound that changed color between two distinct ranges: black to green and blue to green, within a temperature range of 89.6°F to 100.4°F.

By 1975, he had found a way to use this "magic" compound in necklace pendants and rings. A natural salesman, he claimed that the shifting colors indicated the "warmth of the wearer's character." However, Wenick never patented his invention, resulting in one of the most dramatic oversights in fashion history.


Star Trek, disappointed, missed opportunity, dangIf only Wenick had patented the mood ring...Giphy

Potential customers weren't the only ones who took notice of Wernick's invention. Soon, two New York inventors, Joshua Reynolds and Maris Ambats, began producing their version of the temperature-sensitive jewelry, based on Wenick's "magical compound."

There was a distinction: Reynolds and Ambats told customers that they had created a "real biofeedback tool" that allowed the wearer to learn information about their bodies, positioning their rings as devices to help people meditate and control anxiety. (Which seems eerily similar to a few of today's developments...)

Now inextricably linked with the self-exploration and individualism of the 1970s, sometimes referred to as the "Me Decade," Reynolds and Ambats' "mood rings" became a major fad in the United States.


How mood rings work

Mood rings contain a thermochromic element, which is a crystal encased in quartz or glass that changes its color based on the wearer's body temperature. These specialized crystals are designed to react to changes in temperature, which alter their molecular structure and, consequently, the wavelengths of light (colors) they reflect. Psychologically, the idea is that one's emotional state influences body temperature, so when it changes, its meaning will be reflected in the ring. Today, the spectrum of color has expanded far beyond Wenick's simple black, green, and blue system.

When the mood ring rests at a neutral body temperature (typically around 98.6°F), the crystals will reflect a pretty blue-green hue. According to HowStuffWorks.com, the following colors are associated with these emotions, although they can vary from one mood ring to another.


Crystal, mood ring, science, colors, spinningCrystals encased in quartz or glass change color according to body temperature. Giphy


  • Black: Significant levels of stress, tension, or anxiety. There is a deep well of emotional turmoil here, bubbling just under the surface. (This could also indicate that the crystals have been compromised.)
  • White: A lack of emotional clarity. This color can signify that the wearer is uncertain about how to express or process their current feelings, and is often associated with feelings of frustration, confusion, or a lack of emotional clarity.
  • Amber or Gold: "The appearance of an amber or gold-colored mood ring often signifies a blend of emotions, potentially encompassing a mix of feelings such as surprise, nervousness, or even a touch of upset. This color can be a reflection of the wearer's internal turmoil as they navigate a complex emotional landscape."
  • Pink: "The appearance of a pink mood ring is often linked to the initial stages of arousal, interest, or a sense of emotional uncertainty. This color can suggest that the wearer is experiencing a heightened state of emotional vulnerability or a newfound sense of attraction or curiosity."
  • Red: "The presence of a red mood ring is typically associated with high-energy emotions, such as passion, anger, or even fear. This intense color can be a reflection of the wearer's heightened state of arousal, whether it be in the context of romantic love, intense frustration, or a surge of adrenaline."
  • Blue: "The presence of a blue mood ring is often interpreted as a sign of happiness, joy, and a generally positive emotional state. This color can suggest that the wearer is feeling upbeat, sociable, and in a state of emotional equilibrium."
  • Purple: "A purple mood ring is frequently associated with a sense of clarity, purpose, and spiritual insight. This color can signify that the wearer is in touch with their higher self, tapping into their intuition and creativity to navigate their emotional landscape with a renewed sense of direction and understanding."

Debunked

So, some unfortunate bad news. Mood rings are not scientifically factual. Why? Let's debunk.

First off, mood rings measure temperature, not emotion. While emotions can influence body temperature, the ring's color shifts are more likely to be affected by other factors, such as environmental temperature, physical activity, health conditions, and caffeine intake. Also, the color guide (above) is fun but completely arbitrary. There have never been any scientific studies on whether the corresponding colors have anything to do with their associated internal emotions.


Bill Nye, science Unfortunately, mood rings are not backed by the power of science. Giphy


The end of the story

Back to the "one of the most dramatic oversights in fashion history." The mood ring is a cautionary tale. When mood rings hit the market in 1975, the public went wild, with Joshua Reynolds and Maris Ambats selling an astonishing 40 million rings in just three months. They had the ingenious idea to start selling the rings at a premium, with silver-banded versions priced at $45 and gold-banded versions costing $250 ($1,400 today). By the end of the year, their total sales had reached $15 million.

Yes, the original creator, Marvin Wenick, was mad, but Reynolds and Ambats were even more upset in the end. They also had failed to patent the mood ring, the very fatal error that had allowed them to steal the creation in the first place. By the onset of 1976, just as sales were peaking, the market became oversaturated with cheap knock-offs and demanded plummeted, leaving companies with stockhouses full of unsold inventory. What goes around comes back around. Perhaps they should have consulted their mood ring first?

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Science

The 'world's slowest experiment,' going for nearly 100 years, is still endlessly fascinating

It takes nearly a decade for one drop of this liquid to fall.

upload.wikimedia.org

John Mainstone was the custodian of the Pitch Drop Experiment for 52 years.

Because we use water all the time, most of us have an intuitive sense of how long it takes a drop of water to form and fall. More viscous liquids, like oil or shampoo or honey, drop more slowly depending on how thick they are, which can vary depending on concentration, temperature and more. If you've ever tried pouring molasses, you know why it's used as a metaphor for something moving very slowly, but we can easily see a drop of any of those liquids form and fall in a matter of seconds.

But what about the most viscous substance in the world? How long does it take to form a falling drop? A few minutes? An hour? A day?

How about somewhere between 7 and 13 years?

pitch drop experiment, tar pitch, solid or liquid, physics, world's longest experimentPitch moves so slowly it can't be seen to be moving with the naked eye until it prepares to drop. Battery for size reference.John Mainstone/University of Queensland

The Pitch Drop Experiment began in 1927 with a scientist who had a hunch. Thomas Parnell, a physicist at the University of Queensland in Australia, believed that tar pitch, which appears to be a solid and shatters like glass when hit with a hammer at room temperature, is actually a liquid. So he set up an experiment that would become the longest-running—and the world's slowest—experiment on Earth to test his hypothesis.

Parnell poured molten pitch it into a funnel shaped container, then let it settle and cool for three years. That was just to get the experiment set up so it could begin. Then he opened a hole at the bottom of the funnel to see how long it would take for the pitch to ooze through it, form a droplet, and drop from its source.

It took eight years for the first drop to fall. Nine years for the second. Those were the only two drops Parnell was alive for before he passed away in 1948.

- YouTubewww.youtube.com

In total, there have been nine pitch drops in the University of Queensland experiment. The first seven drops fell between 7 and 9 years apart, but when air conditioning was added to the building after the seventh drop, the amount of time between drops increased significantly. The drops in 2000 and 2014 happened approximately 13 years after the preceding one. (The funnel is set up as a demonstration with no special environmental controls, so the seasons and conditions of the building can easily affect the flow of the pitch.)

The next drop is anticipated to fall sometime in the 2020s.

pitch drop experiment, tar pitch, solid or liquid, physics, world's longest experimentThe first seven drops fell around 8 years apart. Then the building got air conditioning and the intervals changed to around 13 years.RicHard-59

Though Parnell proved his hypothesis well before the first drop even fell, the experiment continued to help scientists study and measure the viscosity of tar pitch. The thickest liquid substance in the world, pitch is estimated to be 2 million times more viscous than honey and 20 billion times the viscosity of water. No wonder it takes so ridiculously long to drop.

One of the most interesting parts of the Pitch Drop Experiment is that in the no one has ever actually witnessed one of the drops falling at the Queensland site. The drops, ironically, happen rather quickly when they do finally happen, and every time there was some odd circumstance that kept anyone from seeing them take place.

The Queensland pitch drop funnel is no longer the only one in existence, however. In 2013, Trinity College in Dublin, Ireland, managed to capture its own pitch drop on camera. You can see how it looks as if nothing is happening right up until the final seconds when it falls.

- YouTubewww.youtube.com

Today, however, with the internet and modern technology, it's likely that many people will be able to witness the next drop when it happens. The University of Queensland has set up a livestream of the Pitch Drop Experiment, which you can access here, though watching the pitch move more slowly than the naked eye can detect is about as exciting as watching paint dry.

But one day, within a matter of seconds, it will drop, hopefully with some amount of predictability as to the approximate day at least. How many people are going to be watching a livestream for years, waiting for it to happen?

PoorJohn Mainstone was the custodian of the experiment for 52 years, from 1961 to 2013. Sadly, he never got to witness any of the five drops that took place during his tenure. Neither did Parnell himself with the two that took place while he was alive.

John Mainstone, pitch drop experiment, university of queensland, physicsJohn Mainstone, the second custodian of the Pitch Drop Experiment, with the funnel in 1990.John Mainstone, University of Queensland

Sometimes science is looks like an explosive chemical reaction and sometimes it's a long game of waiting and observing at the speed of nature. And when it comes to pitch dripping through a funnel, the speed of nature is about as slow as it gets.


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Innovation

Researchers tested a bottle of Fiji Water against a glass of tap water. This is what they found.

Bottled water is filthy.

Image via Canva

A lab technician tests bottles of water

Here are six facts from the video above by The Story of Stuff Project that I'll definitely remember next time I'm tempted to buy bottled water.



- YouTubewww.youtube.com


1. Bottled water is more expensive than tap water (and not just a little).



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A Business Insider column noted that two-thirds of the bottled water sold in the United States is in individual 16.9-ounce bottles, which comes out to roughly $7.50 per gallon. That's about 2,000 times higher than the cost of a gallon of tap water.

And in an article in 20 Something Finance, G.E. Miller investigated the cost of bottled versus tap water for himself. He found that he could fill 4,787 20-ounce bottles with tap water for only $2.10! So if he paid $1 for a bottled water, he'd be paying 2,279 times the cost of tap.

2. Bottled water could potentially be of lower quality than tap water.



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Fiji Water ran an ad campaign that was pretty disparaging about the city of Cleveland. Not a wise move. The city ordered a test of the snooty brand's water and found that Fiji Water contained levels of arsenic that weren't seen in the city's water supply.

How was that possible? Sarah Goodman of the New York Times explains:

" Bottled water manufacturers are not required to disclose as much information as municipal water utilities because of gaps in federal oversight authority. Bottom line: The Food and Drug Administration oversees bottled water, and U.S. EPA is in charge of tap water. FDA lacks the regulatory authority of EPA."

3. The amount of bottled water we buy every week in the U.S. alone could circle the globe five times!



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That sounded like it just had to be impossible, so we looked into it. Here's what our fact-checkers found:

"According to the video, ' People in the U.S. buy more than half a billion bottles of water every week.' National Geographic says for 2011, bottled water sales hit 9.1 billion gallons (roughly 34 billion liters).

A 'typical' water bottle is a half-liter, so that's about 68 billion bottles per year. Divided by 52 weeks would be a little over 1 billion bottles of water sold per week in the U.S. Because that's based on a smaller 'typical' bottle size, it seems reasonable that a half billion bottles a week could be accurate.

The Earth is about 131.5 million feet around, so yep, half a billion bottles of varying sizes strung end-to-end could circle the Earth five times."

4. Paying for bottled water makes us chumps.



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Beverage companies have turned bottled water into a multibillion-dollar industry through a concept known as manufactured demand. Bottled water advertisements used a combination of scare tactics (Tap water bad!) and seduction (From the purest mountain streams EVER!) to reel us in.

Well, we now know their claims about the superior quality of bottled water are mostly bogus. And research shows that anywhere from a quarter to 45% of all bottled water comes from the exact same place as your tap water (which, to reiterate, is so cheap it's almost free).



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5. Bottled water is FILTHY.

It takes oil — lots of it — to make plastic bottles. According to the video, the energy in the amount of oil it takes to make the plastic water bottles sold in the U.S. in one year could fuel a million cars. That's not even counting the oil it takes to ship bottled water around the world.

And once we've guzzled our bottled water, up to 80% of the empty bottles end up in landfills or noxious-gas-producing incinerators. The rest is either recycled or shipped to countries like India where poor people without environmental and labor protections have to deal with it.

On top of all that, the process of manufacturing plastic bottles is polluting public water supplies, which makes it easier for bottled water companies to sell us their expensive product.

6. There are 750 million people around the world who don't have access to clean water.


A child dies every minute from a waterborne disease. And for me, that's the core of what makes bottled water so evil.

The video wraps by comparing buying bottled water to smoking while pregnant. That may sound extreme, but after learning everything I just did about the bottled water industry, I can't disagree.



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If you're properly disgusted, here are a few ways you can help destroy the bottled water industry:

  1. Don't buy bottled water. Get a reusable water bottle. The savings will add up.
  2. Rally your schools, workplaces, and communities to ban bottled water.
  3. Demand that your city, state, and federal governments invest in better water infrastructure.

This article originally appeared 10 years ago.

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Education

One teacher's simple, disgusting experiment drives home the importance of hand washing

"Hand sanitizer is not an alternative to washing hands!"

Facebook/Jaralee Metcalf

Simple. Disgusting. Informative.

One of the biggest breakthroughs in preventing the spread of illnesses and infections in hospitals was embarrassingly simple: hand washing. In 1846, Hungarian physician Ignaz Semmelweis discovered that hand washing played a vital role in the spread of germs, and the practice soon became mandatory in hospitals. The simple act of scrubbing hands with soap and water literally saved lives.

Getting a kid to wash their hands, however, can be an uphill battle. While it's a common thing kids (don't) do, global perspective on the importance and effectiveness of hand washing has risen since the COVID-19 pandemic. According to a study published by the National Library of Medicine (NLM) in 2023, before the emergence of COVID-19, a survey found that only about 36% of people always washed their hands with soap, 48% sometimes used soap, and an unsettling 16% of respondents said they wash without soap. After COVID-19 emerged, however, more than 72% of respondents reported using soap every time they washed their hands. There's nothing like a pandemic (and perhaps the reality of FAFO) to strike fear into the hearts of those chronic under washers, but in 2019, one teacher did a simple experiment to show her students just how important hand washing is.

"We did a science project in class this last month as flu season was starting," teacher Dayna Robertson and classroom behavioral specialist Jaralee Metcalf wrote on Facebook. "We took fresh bread and touched it. We did one slice untouched. One with unwashed hands. One with hand sanitizer. One with washed hands with warm water and soap. Then we decided to rub a piece on all our classroom Chromebooks." Robertson later noted that they normally do make a point to sanitize the classroom Chromebooks, but didn't that day in the name of science.

science, experiment, dexter's lab, cartoon, kids, hygiene Dexters Laboratory What A Fine Day For Science GIFGiphy

The bread was put into plastic bags and the germs were left to fester. The bread that had been touched by unwashed hands and the bread that had touched the Chromebook had the most mold. The bread that had been touched by hands washed with soap and water remained (relatively) good enough to eat.

This experiment has been done before, but Robertson expanded on it by testing the effectiveness of hand sanitizer. The bread that had been touched by hands cleaned with sanitizer also had a fair amount of mold on it, although not as much as the bread touched by unwashed hands.

bread, mold, experiment, education, hand washing, cleanlinessThe bread doesn't lie. Facebook/Jaralee Metcalf

"As somebody who is sick and tired of being sick and tired of being sick and tired," Robertson wrote, "wash your hands! Remind your kids to wash their hands! And hand sanitizer is not an alternative to washing hands!! At all!" It's kind of making us retroactively gag over seeing port-a-potties with hand sanitizer set up in lieu of sinks.

The experiment was prompted by a different science lesson. "We had just finished a science lesson on how leaves break down during winter. The kids were kind of grossed out by the mold, so we decided to run our own version using germs and mold from our own environment," Robertson told Scary Mommy.

Weirdly, the classroom experiment received some criticism. "Lots of people actually DEFENDED not washing their hands!" Robertson told Scary Mommy. "That was shocking! It really was just a simple classroom experiment to teach about mold but we have all learned more about how easily we can spread the germs we can't see."

In the 2019 lens, this lesson being about mold seems simple enough. All of us here in 2025, though, blessed (or cursed) with the experience of the pandemic, know that washing your hands really is as life-saving as Semmelweis proved nearly two centuries ago. Research done in 2020 and published in PubMed showed that individuals who washed their hands consistently were more likely to have lower rates of COVID-19 infection. According to the Centers for Disease Control and Prevention (CDC) in 2024, hand washing also reduces respiratory illness like colds and flu in the general population by 16-21%, and reduces the number of people with diarrheal illnesses by 23-40%.

And to be sure, how we wash our hands is incredibly important. A quick rinse without scrubbing won't do the trick. According to the World Health Organization (WHO), the proper technique for handwashing is to wet your hands, apply soap, and then run your soapy hands under the stream while rotating, rubbing, and scrubbing every inch of your hands for at least 20 seconds. Usually you can hit that mark by singing "Happy Birthday" twice. Then, rinse. When you're done, dry your hands with a clean towel. Check out this demonstration from the CDC:

- YouTubewww.youtube.com

The moral of the story is, please, please remember to always wash your hands. It really makes a difference.

This article originally appeared six years ago. It has been updated.

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