The standard measurement for precious metals comes from a small town in France

A gold standard is a system where every dollar in circulation can be exchanged for a set amount of gold

For centuries, the things people used as money had intrinsic value, such as precious metals like gold. In medieval Italy, giant wheels of parmesan cheese were once used as a store of value.

All of the world's gold, visualized

Out of the total above-ground stock of gold (weighing roughly 216,265 metric tons), the largest share is found in jewelry (97,149 metric tons).

Bullion is either gold or silver that has at least 99.5% or 99.9% purity, respectively

It’s typically kept in the form of bars or ingots. Governments and central banks often keep bullion reserves on hand; they can use it as a hedge against inflation. One can invest in bullion via ETFs, among other financial vehicles.

The value of a 400 oz gold bar hit $1M for the first time in 2024

On Aug. 16, 2024, the gold bar size often seen in movies hit $1M in value for the first time when the price of gold reached $2,500 per troy ounce. A data visualization shows what other gold bar sizes are worth and compares them to the size of an iPhone.

The world's biggest silver producers, mapped

Mexico, with its deep history of silver mining, is the dominant leader in silver production, with over 200 million ounces (as of 2023), with China and Peru in second and third place. The precious metal is increasingly important for the electronics industry, and its price is expected to keep rising. See a chart of the biggest silver miners here.

The Lombardi Trophy is handcrafted from sterling silver each year

Made annually by Tiffany & Co., the Lombardi Trophy is hand-formed from sterling silver, taking months of work and dozens of labor hours before final engraving is completed after the Super Bowl.

The Gold Road: how the medieval empires of West Africa traded across the Sahara

Throughout the Middle Ages, the West African empires of Ghana, Mali, and Songhai moved valuables across the Sahara and as far north as France using the Gold Road. This route enabled the trade of gold, ceramics, manuscripts, ivory, religion, and...

The British pound is the oldest currency still in use

Also known as the “pound sterling,” the British pound is more than 1,200 years old. It dates back to around 775 CE, but it didn’t become the official currency of England until the 12th century. One pound originally represented a pound of silver. The below graphic shows some of the other oldest currencies still in use today.

‘Mint marks’ are tiny letters on US coins that correspond to which mint location created them

As more mint branches opened up after Philadelphia (the first mint location), these “mint marks” helped hold each branch responsible for the quality of the coin. A coin minted in Philadelphia, for instance, would have the letter “P” on it. Some mint marks are extremely rare, making coins displaying them particularly valuable to collectors.

Since 1983, the meter has been defined based on the speed of light

The 1875 Metre Convention established the unit as the length between two lines inscribed on the surface of bars made by the International Bureau of Weights and Measures. Advancements in the measurement of light redefined it as the distance light travels in 1/299,792,458 of a second.

A look at Mauna Loa, which produces the gold standard of global CO2 measurements.

Mauna Loa Observatory is a station that measures the elements in the atmosphere that contribute to climate change. It is located on the side of the Mauna Loa volcano in Hawaii. 

Switzerland is widely considered the world capital of cheese

This charming infographic looks at the cheese-related habits of Europe’s top three cheese-producing countries: Italy, France, and Switzerland. Cheeses in France are reported to be the lightest, and Swiss cheeses the heaviest.

About 20% of asteroids are metal worlds similar to Earth's core

The biggest of these (that we know of) is 16 Psyche. Measuring 140 miles across, its iron and nickel content is potentially worth 10,000 quadrillion dollars. NASA’s mission to Psyche—reaching the asteroid in 2029—will study it to learn about its formation.

12 things we learned about Champagne

Champagne isn’t just sparkling wine—it’s a protected name tied to France’s Champagne region and made using the strict champenoise method. This explainer looks at its surprising history, from early fermentation mishaps to how it became a global symbol of celebration.

During the Medieval Period, urban populations grew significantly

As workers moved from fields to cities throughout the era, large metropolises of enduring strategic importance were formed from Paris, France, to Baghdad, Iraq.

The Louvre in Paris has its own particle accelerator for art analysis

The Accélérateur Grand Louvre d'analyse élémentaire serves as a noninvasive tool for identifying and quantifying trace elements present in artworks by analyzing how particles backscatter off targets. This information can help detect forgeries and determine a piece's provenance. (Some readers may experience a paywall.)

19th-century Americans discovered tipping in Europe

Tipping waiters was a custom in medieval Europe, where masters gave their serfs money for exceptional work. Wealthy Americans vacationing in Europe in the mid-1800s discovered the behavior and brought it back to the US.

How the ancients calculated Earth's size correctly

Watch this seven-minute video to hear Carl Sagan explain how ancient Greek polymath Eratosthenes correctly calculated the size of the Earth in the third century BCE. At some point, Eratosthenes noticed a discrepancy in the length of shadows cast in different cities during the summer solstice. This observation grew into a simple experiment that enabled Eratosthenes, the head librarian at the Library of Alexandria, to calculate the Earth's size precisely.

Wedding rings can be traced back to ancient Egypt, where the ring symbolized eternity

The tradition later spread through Greece and Rome, evolving with precious gems during the medieval period. Diamonds became central after De Beers' 1947 "a diamond is forever" campaign, boosting sales by 50% in three years.

The first Trader Joe's opened in California in 1967

Joe Coulombe was inspired by his travels outside the United States and wanted to open a store that offered some of the flavors he'd tasted abroad. Now, the store's unique products attract international visitors, who view it as a tourist destination.

There are several theories for how the Oscar got its name

Several different people claim to have bestowed the famous nickname, including a librarian who thought the knight resembled her uncle Oscar and a gossip columnist who was poking fun at a local theater owner.

Estée Lauder once broke a bottle of the hit perfume 'Youth Dew' to convince French department stores to carry the product

Youth Dew, originally launched in 1953 as a bath oil, was wildly successful in the American market and one of the early products that cemented Estée Lauder as a luxury cosmetics brand. When the Galeries Lafayette in Paris hesitated to sell the perfume, Lauder "accidentally" broke a bottle of Youth Dew, causing the smell to spread throughout the department store. Shoppers began asking for the scent, and the department store agreed to sell it.

Various ancient writers reinterpreted the life of Helen of Troy

Helen of Troy is the woman whose face launched a thousand ships and the Greek wife of Menelaus taken by Paris of Troy to be his wife. To get her back, the Greeks launched the war that would end in the burning of the city of Troy and contribute to the literary tradition through Homer, Horace, and more.

The US dollar is the most widely circulated currency in the world, and is involved in nearly 90% of global transactions

How crude oil is split across oil markets based on geographic origin

Brent, West Texas Intermediate, and Dubai are the three crude oil classes and differ in terms of typical refinery uses, density, sulfur content, and suitability for financial benchmarking. Brent, which originates in the North Sea, is traders' go-to benchmark, in part, because it is easily shipped and politically stable, and used to price most of the crude sold internationally.

What one seventh-century European teen might have looked like

A 16-year-old girl believed to have traveled from Central Europe to England in the seventh century was buried with rare, expensive jewelry. Her body was found in Cambridge, England in 2012, and analysis revealed what her face likely looked like. See...

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.

Poison ivy was sent to Europe in the 1600s as an exotic, ornamental oddity, where it was purposefully grown in the English royal gardens at Kew, the Faculty of Medicine in Paris, and a few other locations.

See photos of Meteora, a mountainous site in central Greece, home to 14th-century monasteries perched atop soaring outcroppings.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

Track the location of the Voyager probes, currently between 13 and 15 billion miles away from Earth.

Mark Twain spent decades feuding with the US Postal Service, convinced its costs and regulations were bureaucratic overreach.

Double world record holder Hunter Ewen helped conquer his fear of balloons, called globophobia, by training to win Guinness World Record titles for balloon inflation.

While atoms are normally made of protons, neutrons, and electrons, exotic ones have been built with antimatter—alternate versions of normal matter that live for fractions of a second and are about a billion times as rare.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

In preparation for this weekend's Eurovision finale, which is something like the World Cup of pop music, here's a young Céline Dion performing (for Switzerland?) at the 1988 competition.

Objects can be 3D printed with light by projecting 2D computerized tomography (CT) scans onto rotating cylinders of resin, which solidify upon exposure.

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.

Quincy Jones' 'Big Band Bossa Nova' helped introduce bossa nova—a jazz-influenced Brazilian genre—to the US

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

Browse a detailed visual analysis of over 200,000 similes—comparisons that often use 'like' or 'as'—from popular fiction to see how frequently writers the same idiomatic expressions.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.