10 Facts About Lithium

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Lithium is one of the smallest, simplest, and oldest elements, but it has been tapped to unlock some big, messy problems. It's a key ingredient in the batteries that power smartphones, laptops, and electric cars. But it's also proven to be one of the most effective treatments for bipolar disorder, and recent research may make lithium the key to unlocking the causes of that illness.

1. THE MAN WHO DISCOVERED LITHIUM GAVE UP SCIENCE SOON AFTER.

crimson flames
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In 1800, Brazilian naturalist José Bonifácio de Andrada e Silva discovered petalite, a rare gem-quality mineral found in granite, on the island of Utö, Sweden. He found that the rock had a strange quality: When thrown into a fire, it created intense crimson flames. In 1817, a 25-year-old Swedish aristocrat-turned-chemist named Johan August Arfvedson discovered lithium while analyzing petalite. Arfvedson identified the culprit for the red flames by process of elimination: Having recognized most of the mineral's content as silica and aluminum, he deduced a new alkali metal made up the remaining share. It was Arfvedson's only recorded discovery; he soon retired from chemistry to manage his inherited fortune.

Lithium was later isolated in its elemental metal form using electricity. That process, electrolysis, is still used in lithium production.

2. LITHIUM IS BORN IN STELLAR EXPLOSIONS—WHICH WE ONLY LEARNED IN 2013.

Hydrogen, helium, and lithium, the first three elements in the periodic table, were all created in the Big Bang, but the first two elements are abundant, and lithium is not. Astrophysicists had a theory that novae, or stellar explosions, were responsible for lithium's scant distribution in the universe, but they didn't have data for how that worked until Nova Centauri's December 2013 explosion—visible to the naked eye, if your eyes were in the southern hemisphere. Researchers witnessed the dying star ejecting lithium into space.

3. ITS SOURCES ARE LIMITED.

atacama salt flats in chile
Francesco Mocellin, Wikimedia Commons // CC BY-SA 3.0

More than half of the world's lithium supply comes from high-altitude lakes and bright white salt flats in the "lithium triangle" in Bolivia, Chile (as seen above), and Argentina, where it's mined in a grid of brine pools. In other regions, it comes from open-pit mines spiraling into layers of earth. Deposits have also been found in Australia, in the Tibetan portion of China, and in the U.S. in North Carolina and Nevada. Between 2015 and 2016, the price per ton of the commodity more than tripled, leading the UK to search for domestic supplies. At the current pace, according to consulting company Stormcrow Capital, demand for lithium could outpace production by 2023. To get around this looming shortage, some researchers are developing ways to recycle used lithium-ion batteries.

4. LITHIUM IS NEVER FOUND ALONE.

fragment of petalite
Eurico Zimbres, Wikimedia Commons // CC BY-SA 2.5

Lithium doesn't range freely through nature, but instead has to be isolated from other minerals. Often, it's sourced from petalite (above). It's found in traces in almost all igneous rocks and in many mineral springs. Those who swim in lithium-infused hot springs are often told that it has curative powers, including improved brain function and elevated mood—though there's no evidence of this.

5. IT POWERS MANY OF YOUR DEVICES.

Lithium has several advantages that make it the go-to for powering everything from smartphones to hybrid cars. It's the lightest known metal, which means it can store power without adding a lot of weight to devices. Lithium-ion batteries also have some of the highest energy densities of any current battery technology; they deliver three times the voltage of nickel-based batteries, according to the University of Washington's Clean Energy Institute.

But those aren't lithium's only advantages. Many nickel-based batteries experience what's known as the "memory effect"—if they're repeatedly plugged in to charge before they're fully dead, they'll lose power capacity (so instead of remembering its full capacity, the battery will only remember half, for example). But that's not the case with lithium-ion batteries, which are believed to have no memory effect.

6. IT'S KEY TO IMPROVING ELECTRIC VEHICLES …

Current electric vehicle models require recharging after around 300 miles of driving. Given the limited number of re-charging stations available around the nation, that could make for tough logistics on cross-country road trips. So the Department of Energy is funding battery research to improve that range and has recruited five universities, three national laboratories, and IBM to the Battery500 Consortium to develop smaller, lighter, more efficient batteries that could, among other potential uses, increase the range of electric cars.

"If we're successful, we'll be able to double the range of electronic vehicles today. This by itself is extremely challenging," says Jihui Yang, chair of the University of Washington's department of Materials Science and Engineering.

Yang and his collaborators aim to replace the graphite currently used in the negative electrode of lithium-ion batteries with lithium metal. Doubling the use of lithium would significantly increase the power output of those batteries. To do so, though, they'll have to solve a big problem: In the all-lithium batteries that currently exist, lithium grows needle-like dendrites that can puncture the separator—a thin layer of porous polymer separating the negative and positive sides of a battery—causing the battery to short.

7. … AND HAS SET PLANES AND PHONES ON FIRE.

samsung galaxy 7 phone and recall notice
George Frey/Getty Images

Battery shorts can be more than just annoying—they can be incendiary. Some Boeing airplanes use lithium-ion batteries to power up their jet engines, and the quickly recharged batteries then serve as a backup power supply for electrical systems. But the Federal Aviation Administration grounded the entire Boeing 787 Dreamliner fleet in 2013 after one plane's lithium-ion battery shorted out and started a fire—shortly after passengers had disembarked in Boston—and a battery malfunction warning went off in another plane.

Tesla Model S cars also saw fires in 2013 attributed to battery malfunctions. Then the Samsung Galaxy Note 7 phones started catching fire, prompting the FAA to ban the phones from flights. Samsung had tried to boost battery capacity to accommodate consumers' increasing game-playing and video-streaming habits while also shrinking the phone. Tasked with doing more in a smaller size, it became prone to meltdowns.

There's a reason why the batteries are so combustible. Lithium ions pass through the tiny holes in the separator between the positive and negative electrodes of the battery, carried by a liquid electrolyte solution. But if the separator is damaged—like by dropping your phone—or the chemistry underway is changed by the heat of recharging or sitting in the sun, the equation changes. The outputs of those changed chemical reactions include flammable gases, and lithium itself can also ignite in humid air. The Federal Aviation Administration now requires spare rechargeable lithium batteries be transported in carry-on baggage. If a fire from a cell phone or laptop battery starts on board, the FAA has advised flight attendants to use water or soda to extinguish it, though a foam extinguisher or dry chemical fire extinguisher can also be used.

8. IT'S USED TO TREAT MENTAL ILLNESSES …

Lithium has been used for more than a century to treat bipolar disorder and other mental illnesses, including depression, schizophrenia, and eating disorders. It's also used to treat anemia, headaches, alcoholism, epilepsy, and diabetes. But there's a narrow difference between the dose at which it's effective and the one at which it is lethal.

"It's not that people don't know what lithium does in general, the problem is that it does too many things," says Evan Snyder, a professor in the human genetics program with Sanford Burnham Prebys Medical Discovery Institute, who studied the disorder as part of research on defects that involve more than one abnormal gene. He likens prescribing lithium to using a sledgehammer on a nail; there's a lot of collateral damage. "What we'd like is a very tiny, mini hammer just to precisely hit exactly what it is that lithium is doing," he tells Mental Floss.

But first, scientists needed to know which nail to swing for, and for that, Snyder studied lithium's affects in the brain. Research Snyder published in 2017 details how the drug works to regulate connections in the brain's nerve cells. Now, he says, that effect can be compared with other drugs to search for a more targeted treatment; right now, it works on only one out of every three patients.

9. … BUT THERE CAN BE LONG-TERM SIDE EFFECTS.

At age 17, Jaime Lowe believed her parents were secret agents, saw the Muppets heckling her, and thought she could converse with Michael Jackson and follow secret tunnels to Neverland. She was soon diagnosed as bipolar, and daily doses of lithium stabilized the manic episodes; without it, as she wrote in a New York Times essay about her life on the drug, she'd be "riding on top of subway cars measuring speed and looking for light in elevated realms." About one-third of people with bipolar disorder see their symptoms relieved by lithium.

But that can come at a price. Lithium's side effects include weight gain, nausea, and the exacerbation of heart and kidney disease. In Lowe's case, after 20 years of taking the drug, she began to have spiking blood pressure and other signs of kidney failure. Her doctor gave her a choice between switching off the drug that had given her a functional life—or getting a kidney transplant. She chronicles the experience—and her trip to Bolivia to hike the salt flats where lithium is mined—in her 2017 book Mental: Lithium, Love, and Losing My Mind.

10. LITHIUM WAS ONCE A KEY INGREDIENT IN 7 UP.

7 Up ad featuring family in 1948 issue of Ladies' Home Journal magazine
Internet Archive, Wikimedia Commons // No known copyright restrictions

Before "7 Up" became its name and holiday party punchbowls everywhere became its prime target, the soft drink, which debuted in 1929, was briefly called "Bib-Label Lithiated Lemon-Lime Soda," and its original ingredients included lithium citrate. To make its product stand out in a sea of 600 lemon-lime soft drinks already on the market, Cadbury Beverages North America touted the supposedly positive health effects of the lithium in the soda, which was released just weeks before the 1929 stock market crash and the onset of the Great Depression. Apparently the recipe had some appeal: In the 1940s: 7 Up was the third best-selling soft drink in the world, according to Cadbury. (Look how happy the family above seems in this ad from the March 1948 issue of The Ladies' Home Journal.) Lithium was included in its recipe until 1950.

10 Facts About the Element Lead

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iStock.com/aeduard

Lead (Pb) is one of the most infamous elements in the periodic table. Though it’s now widely known as the source of lead poisoning, humans have been using the heavy metal for thousands of years. It’s soft, has a relatively low melting point, is easy to shape, and doesn’t corrode much, making it incredibly useful. It’s also relatively abundant and easy to extract. But lead is so much more than just No. 82 on the periodic table. Here are 10 facts about the element lead.

1. The element lead is easy to extract.

One reason people have been using lead for so long is because it’s so easy to extract from galena, or lead sulfide. Thanks to lead’s low melting point of 621.4°F (compare that to the melting point of iron, 2800°F), all you have to do to smelt it is put the rocks in a fire, then extract the lead from the ashes once the fire burns out.

Galena is still one of the major modern sources of lead. Missouri, the biggest producer of lead in the U.S. (and home to the largest lead deposits in the world), designated galena as its official state mineral in 1967. Galena is also the state mineral of Wisconsin, where it has been mined since at least the 17th century. Several towns across the U.S. are named after the mineral as well, most notably Galena, Illinois, one of the centers of the American “Lead Rush” of the 19th century.

2. People have been using lead since prehistory.

The oldest smelted lead object ever found was discovered in a cave in Israel in 2012. Researchers have dated the wand-shaped tool—potentially a spindle whorl—to the late 4000s BCE, tracing its origins to lead ores in the Taurus mountains of what is now Turkey.

3. Lead poisoning can be fatal.

Lead has a fairly similar chemical structure to calcium. Both have two positively charged ions. Because of that, inside the body, the toxic metal can bind to the same proteins as the vital mineral. Over time, lead poisoning occurs as the element crowds out the minerals your body needs to function, including not just calcium, but iron, zinc, and other nutrients.

Lead can travel through the body in the same way that those minerals can, including passing through the brain-blood barrier and into the bones. As a result, exposure to lead—whether through paint, pipes, contaminated soil, or any other means—can be very dangerous, especially for children, for whom lead poisoning can cause learning disabilities, delayed growth, brain damage, coma, and death. Scientists believe there is no safe threshold for lead exposure.

4. Ancient Romans really loved lead.

Lead use reached new heights during the Roman Empire. Ancient Romans used lead to make cookware, water pipes, wine jugs, coins, and so much more. Lead acetate was even used as a sweetener, most often in wine. As a result of ingesting a little lead with every bite of food and sip of water or wine, modern researchers have argued that two-thirds of Roman emperors (as well as plenty of common folk) exhibited symptoms of lead poisoning. A 20th-century examination of the body of Pope Clement II, who died in 1047, showed that lead poisoning led to the religious leader’s sudden demise, too—though there’s still some speculation of whether he was poisoned by an enemy or if he simply drank too much lead-sweetened wine.

5. Lead is a very stable element.

Lead atoms are “doubly magic.” In physics, the numbers 2, 8, 20, 28, 50, 82, and 126 are considered “magic” because those numbers of protons or neutrons completely fill up the atomic nucleus. Lead has 126 neutrons and 82 protons—two magic numbers. As a result, lead isotopes are incredibly stable. Lead-208 is the heaviest stable atom.

6. Lead made car engines quieter—at a high cost.

It’s not surprising that we no longer add lead to gasoline (TIME magazine called it one of the world’s worst inventions back in 2010). But why was it ever there in the first place?

In 1921, a General Motors researcher discovered that adding tetraethyl lead to gasoline reduced “engine knock” in cars, when pockets of air and fuel explode in the wrong place and time in a combustion engine. In addition to producing a loud sound, it also damages the engine. While there were other available chemicals like ethanol and tellurium that could similarly provide the octane boost to reduce knocking, leaded gasoline was easier and cheaper to produce, and unlike tellurium, it didn't reek of garlic.

Unfortunately, it came at a high cost for the refinery workers that produced leaded gasoline (who many of whom were sickened, driven mad, and killed by their exposure to it) and the environment as a whole.

In the 1960s, geochemist Clair Patterson was trying to measure the exact age of the Earth when he discovered a shocking amount of lead contamination in his lab—and everything he tested, from his tap water to dust in the air to his skin and samples of his dandruff. As he continued to experiment, he discovered that lead levels in ocean water began to rise drastically around the same time that lead became a common gasoline additive. Every car on the road was belching lead straight into the atmosphere.

Patterson would later become the driving force in forcing the U.S. government to ban leaded gasoline. (You can read more about him in our feature, “The Most Important Scientist You’ve Never Heard Of.”)

7. Lead was used in paintings …

Historically, lead wasn’t just prized for being an easy-to-shape metal; it was also valued for its color. Though most of us know that lead was historically used in house paint (and still continues to hide in the walls of some homes today), it was also a popular ingredient in fine art for thousands of years.

Produced since antiquity, lead white (also known as Cremnitz white) was a favorite paint pigment of the Old Masters of the 17th and 18th centuries, including artists like Johannes Vermeer and Rembrandt van Rijn.

“For two millennia, white leads—basic lead carbonate and sulfate—were the only white pigments that could deliver moderately durable whiteness and brightness into a drab world of grays and earth colors," pigment experts Juergen H. Braun and John G. Dickinson wrote in the third edition of Applied Polymer Science: 21st Century in 2000. Like a number of other pigments prior to the advent of synthetic paints, its toxicity was general knowledge, but for many painters, the risk was worth it to achieve the color they wanted. You can still buy it today, but it has largely been replaced with the safer titanium white.

Lead white isn't the only lead paint lurking in many famous paintings from history. Dutch artists like Vermeer also favored lead tin yellow, which you can see in his masterpiece The Milkmaid.

8. … and in makeup.

During the 18th century, both men and women used white lead powder to achieve fashionably ghostly complexions, though it was known to be toxic. They powdered their hair with white lead powder, too. The dangerous trend caused eye inflammation, tooth rot, baldness, and eventually, death. To top it off, using lead powder made the skin blacken over time, so wearers needed to apply more and more of the powder to achieve their intended look. Queen Elizabeth I, who lost most of her teeth and much of her hair by the end of her life, reportedly was wearing a full inch of lead makeup on her face when she died. While her cause of death remains unclear, one popular theory holds that she was killed by blood poisoning from her longtime reliance on those lead-filled cosmetics.

Researchers have hypothesized that several other famous historical figures either suffered from or died from lead poisoning, including painters like Vincent van Gogh and Francisco Goya. In several cases, exhumations have proved this: A 2010 analysis of what are thought to be Caravaggio’s bones showed very high levels of lead (enough to drive him crazy, if not outright kill him) likely from his exposure to lead paint throughout his life. Hair and skull fragments believed to belong to Ludwig van Beethoven also show very high lead levels, potentially from the wine he drank.

9. Lead is a superconductor.

Which means that if it is cooled below a certain temperature, it loses all electric resistance. If you were to run a current through lead wire that has a temperature below 7.2K (-446.71°F), it would conduct that current perfectly without losing any energy to heat. A current running through a lead ring could continue flowing forever without an outside energy source.

Like other superconductors, lead is diamagnetic—it is repelled by magnetic fields.

10. On Venus, it snows lead.

Venus is the hottest planet in the solar system, with an average surface temperature of 867°F. That’s far above lead’s 621.4°F melting point. In 1995, scientists discovered what appeared to be metallic “snow” on the mountains of Venus—a planet too hot to have water ice. In 2004, researchers at Washington University in St. Louis discovered that Venusian “snow” was probably a mixture of lead sulfide and bismuth sulfide.

This “snow” forms because Venus’s high temperatures vaporize minerals on the planet’s surface, creating a kind of metallic mist that, when it reaches relatively cooler altitudes, condenses into metallic frost that falls on the planet’s tallest peaks.

How Cold Is It in Canada? Niagara Falls Has Frozen Over

Aaron Vincent Elkaim, Getty Images
Aaron Vincent Elkaim, Getty Images

The cold snap that's gripped the northeast in an icy, subzero chill has made it hard to roll down frozen car windows and navigate roads. Elsewhere, it's having a significantly more spectacular effect: The roaring cascade of water at Niagara Falls at the United States/Canada border has slowed and even come to a stop in some areas, having effectively frozen over.

CNN reports that extreme temperatures have arrested the famous waterfall in spots, creating a kind of winter wonderland that some observers have compared to the handiwork of Elsa in Disney's Frozen. Here's what a similar scene looked like in 2015:

Visitors observe frozen areas of Niagara Falls in 2015
Aaron Vincent Elkaim, Getty Images

And here's a look at footage captured in 2019:

While covered by a sheet of ice, the Falls are not frozen solid: The volume and force of water prevents that. In the 1960s, steel ice booms were added to prevent large blocks from forming farther up the river that could slow the water enough to cause freezing. Instead, it's the surface water and mist that ices over, creating an aesthetically intriguing appearance. If it gets cold enough, ice can form as the water falls, leading to a large deposit on the bottom that can grow to over 40 feet thick.

It's rare for the Falls to come to a complete halt, but before the advent of the ice booms, it was a possibility. On March 30, 1848, gale force winds pushed ice floes from Lake Erie to the mouth of the Niagara River, creating a natural dam and effectively turning off the rushing water. People began walking over the dry riverbed and collected resurfaced weapons from the War of 1812; others thought it was a sign of the end of the world. Niagara Falls has never experienced a near-total interruption since.

[h/t CNN]

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