Before it was a drink, coffee was used for handwashing

Coffee brewing likely originated in Ethiopa and the Arabian Peninsula

A mixture of merchants and colonialism then launched the drink across Europe and the New World. Many European coffee traditions, like the Viennese custom of serving it alongside a small cup of water, are remnants of how coffee has been prepared in the Middle East for centuries.

In the 1600s, coffee had religious significance

In the 1600s, coffee was important in multiple religious traditions. In Yemen, it was the drink of choice for Sufi mystics to improve their focus and fuel their grueling meditations. Pope Clement VIII's approval spread coffee’s popularity from the Muslim to the Christian world, paving the way for the cappuccino.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

Civet coffee is some of the most expensive (and bizarre) coffee in the world

Known colloquially as "cat poo coffee," the style is made from beans that have been consumed and then excreted by the Asian palm civet, a small mammal related to the mongoose. Coffee made from these beans is said to be smooth and complex, with notes of chocolate.

Beanless 'coffee' is an eco-friendly alternative

As we consider the role of agriculture in climate change, many people are seeking alternatives to the most resource-hungry crops—coffee included. Are new synthetic alternatives the answer? Startups are exploring beanless “coffee” made in a variety of ways.

Coffee is, generally, good for your health

While overconsumption certainly has its drawbacks—hello, not sleeping until the sun rises—on the whole, coffee is fine, even beneficial, for your health. It can even help prevent serious health conditions, like heart attacks and liver cancer.

The medieval influencer who convinced people to drink tea

This article explains how the world shifted from mostly eating tea, whether as leaves to be chewed or caffeinated soup to be slurped, to drinking it. Lu Yu's first exposure to tea in the 700s didn't go so well, with him reviewing the concoction as...

A world-famous barista's primer on coffee appreciation

If you think you can tell good coffee from bad but don’t know how to put the distinction into words, world-famous barista Nicole Battefeld-Montgomery is here to help. Her instructions for breaking down a cup of coffee rivals any sommelier’s wine-tasting guide.

Vanilla was originally thought to be an additive for chocolate

The classic flavor didn't stand on its own until the 17th century, when Queen Elizabeth I's apothecary began intentionally making vanilla sweets.

Distinct plant species evolved to produce caffeine as a pesticide

Although it provides a defense against insects trying to eat caffeine-bearing plants, the molecule is an example of exaptation, where its original function was repurposed over time. Studies show that some plants now produce caffeine-laced nectar to help pollinators move more quickly and pollinate more efficiently.

Multiple sugar substitutes were accidental discoveries when lab workers didn't wash their hands

Saccharin, aspartame, and cyclamate all have origin stories from lab workers tasting something sweet on their hands. A Johns Hopkins University worker in the late 1800s, for example, tasted something sweet on his (unwashed or poorly washed) hands during dinner, prompting him to then taste everything on his lab bench in order to identify that the sweetness was a compound derived from his overheated coal tar—a substance he later named saccharin. (Some users may encounter a paywall.)

What did people do before eyeglasses were invented?

An estimated two-thirds of the world's adults use a form of prescription glasses or contacts, proof spectacles were a godsend when they were invented in 1286 CE. But what did people do before that? Different tools were used for distinct vision problems, but some would use magnifying lenses, clear emeralds, and more. Watch this video for a historical explanation.

Cookies were originally used as low-stakes ways to test the temperature of an oven

In 7th century Persia, bakers used small mounds of dough to test the heat in ovens before baking larger cakes. Afterward, they'd add honey, nuts, and other items to the small mounds, creating early cookies.

The history of soap and how it forms bathtub scum and white spots in old oil paintings

Soap has been produced since at least 2,200 BCE via a chemical reaction between fats or oils and a base. This creates salts that act as molecular bridges, helping water lift dirt and grease from surfaces. The same chemistry produces scum when metals in hard water bind to soap molecules, as well as white spots in paintings when metal ions in pigments react with fatty acids in the oil binder.

Food allergies were first documented more than 4,000 years ago

Although food allergies are on the rise in modern times, they have been documented in written records for thousands of years. More than 3,000 years ago, Chinese emperors advised patients to avoid certain foods, and Hippocrates noted in his work that food could cause serious harm to certain individuals, and even lead to death.

In ancient Rome, toast was added to drinks

Toasted bread crumbs absorbed the acidity of bitter wine and, in some cases, added flavor. Although the term "toasting" was not yet in use, the practice was common. Some say the Roman Senate decreed in the first century CE that all citizens must drink to the honor of Emperor Augustus before every meal, though scholars debate the validity of that claim. Eventually, the literal toast became associated with the tributes.

Check out George Washington's beer recipe

The first American president's journal includes a recipe for "small beer," a low-alcohol beverage that was a cleaner (and slightly inebriating) alternative to the potentially sickening water of the time.

An antiperspirant ad campaign in the early 1900s dubbed body odor "B.O."

The product was marketed toward women and framed excessive sweating as a medical disorder that needed to be addressed with the product.

See an image of the earliest surviving coupons used in America

This clip from the "Acquired" podcast shows an image of one of the original Coca-Cola coupons. The hosts argue that the coupons helped popularize Coca-Cola in its early days, making them a key component in the story of one of the world's most iconic brands.

Cacao is a Maya word that survives today

In the 1980s, archaeologists finally deciphered Maya hieroglyphs in part by identifying known words. Maya scholar David Stuart notes that cacao—still used today—was one of the key linguistic anchors that unlocked ancient Maya texts.

The United States had a washing machine that cleaned dirty dollar bills

In the early 1900s, the US Treasury Department had a machine that washed and ironed old, soiled paper bills. The machine helped the Treasury save money by decreasing printing costs for new dollar bills, but had nothing to do with the modern understanding of money laundering.

Humans have used geothermal resources for thousands of years

In North America, Indigenous peoples viewed hot springs as sacred places and used them for medicinal purposes, cooking, and surviving cold weather. The ancient Greeks and Romans also viewed them as sacred, partaking in hot mineral baths to relieve ailments and using them for space heating.

The history of blood, as told by a hematologist

Since ancient times, blood has been seen as a semi-magical substance. Alchemists theorized it was a mixture of the four elements. Others proposed it was one of four bodily fluids whose balance dictated health. This 2019 essay by a hematologist reviews blood's reputation across cultures and centuries.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

British beard history, 101

The beard has gone in and out of fashion for centuries in Britain. It was hated in the 18th century but became a must in the 19th. This quick list rehashes 15 fascinating tidbits about the beard, including possible useful functions for them (a beard is equivalent to an SPF 21 sunscreen) and how barbers were often also surgeons.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

How often should you clean your water bottle?

Experts say a daily wash of a high-use bottle is key to keep away unwanted bacteria and odors. For a good clean, use water—as hot as 140 degrees Fahrenheit—mixed with soap, swirling the mixture in the bottle before letting it sit for 20 minutes. Learn more tips with this quick overview.

A life measured on the backs of coffee receipts

Years ago, a storyteller doodled on the back of a receipt. Hundreds of doodles later, Odding Wang has created a digital diary with a tactile feel. Click through the project's website to peruse the portals into Wang's life and mind. Hovering over a comic will reveal the receipt on the other side.

Jimmy Carter signed a 1978 bill that legalized home brewing, a move credited with kick-starting the craft beer industry.

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

The history of many kitchen appliances involves unexpected discoveries and applications, including wartime radar turned hamster defroster and replacing an 'ice king' with heat-stealing boxes.

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

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

Poison ivy is in the same family as mangoes, cashews, and pistachios—and they all produce oily urushiol in their raw, unprocessed state—but they are typically prepared in ways to avoid causing human discomfort.

English mathematician Ada Lovelace wrote the first computer algorithm a century before computers existed and hypothesized that computing devices would one day be able to compose music—foreseeing the generative AI systems of today.

Against his wishes, Albert Einstein's brain was removed before his cremation, and the pathologist responsible stored it for decades in mason jars within a beer cooler.

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.

To reduce wrinkles in clothing, research recommends gentle wash cycles with more water and tumble drying with smaller loads and longer times.

Cultural norms about how to handle the bodies of loved ones in communities in West Africa have hampered Ebola responses.

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

Hookworm infection, though risky, may help fight certain autoimmune conditions by tamping down the immune system's inflammatory response.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

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

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

El Niño, Spanish for 'the boy,' was named after Jesus Christ because the phenomenon resembled the weather changes observed around Christmastime.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

Pure water does not conduct electricity because this flow of energy requires the movement of charged particles, and water is a neutral molecule.

One of the most famous portraits ever taken is 'Afghan Girl' (1984) by Steve McCurry, yet the subject Sharbat Gula went much of her life without being identified or benefitting from the image's success.

Some researchers have labeled nomophobia, the fear of being without your phone, as 'the phobia of the 21st century.'