Health
Discover facts about health. Small discoveries that change the way you see familiar things.
Health
Early fire alarms waited for the room to heat up
The piercing alarm that warns you of a kitchen disaster used to be tragically sluggish. The earliest fire detectors patented in the 1890s didn't sense smoke…
Discover more
Why pumice stones are born in volcanoes
That rough little gray block sitting on the edge of your tub has a remarkably violent origin story. Pumice is created when super-heated, highly pressurized…
Discover more
The war that led to modern guide dogs
The modern concept of a highly trained canine assistant arose from the tragic aftermath of global conflict. Following World War I, Germany found itself with…
Discover more
Vertical computer mice force a weird handshake grip
If you've ever seen a massive, fin-shaped mouse sitting on a coworker's desk, it’s not an avant-garde art piece. Traditional mice force your forearm to twist…
Discover more
Why eye charts use letters you can't easily guess
The giant chart you stare at during a checkup isn't just a random assortment of alphabet characters. Designed by Hermann Snellen in 1862, the grid…
Discover more
Most cotton balls aren't made of cotton
The fluffy white orbs you buy to wipe off makeup are living an outrageous lie. Despite the incredibly clear name, the vast majority of commercial cotton balls…
Discover more
STACKY FOR IPHONEA bigger world.
One discovery
at a time.
Keep discovering with Stacky. Interesting facts in an app that is always within reach.
The royal nose wipe that became formalwear
Carrying a dedicated square of fabric purely to blow your nose into it sounds incredibly bizarre when you really think about it. King Richard II of England…
Discover more
Scissors began with bronze springs
Before the incredibly satisfying pivot design became standard, cutting anything required significant hand strength. Ancient Mesopotamians fashioned the first…
Discover more
World War I stretchers were giant wicker baskets
Transporting the injured off the battlefield used to resemble a strange, oversized picnic arrangement. During the first World War, many stretchers were…
Discover more
Why wealthy Romans stuffed mattresses with reeds
Achieving a good night's rest in antiquity meant sleeping on materials better suited for a stable. While the poor were forced to lay on piles of itchy straw,…
Discover more
Bidets began as aristocratic furniture
The gentle fountain of cleanliness that modern travelers find so confusing has surprisingly arrogant origins. Invented in 17th-century France, the bidet was…
Discover more
Charles Darwin invented the rolling office chair
The brilliant mind behind natural selection was also the lazy genius behind modern office furniture. Tired of constantly getting up to observe his sprawling…
Discover more
Why doctors use a musician's tuning fork
The vibrating metal prong used to check hearing vibrations was straight-up lifted from the music industry. Invented by a royal trumpeter in 1711 solely to…
Discover more
Sewing thimbles prevented horrific needle injuries
The tiny, decorative metal cap sitting at the bottom of a sewing kit was once a vital piece of personal armor. Before manufacturing became automated,…
Discover more
Surgical gloves began with one nurse’s rash
The universal symbol of medical sterility was actually just a romantic gesture to soothe irritated hands. In 1889, William Halsted noticed his favorite scrub…
Discover more
The ancient Greeks had surprisingly modern showers
We act like the cascading rainfall showerhead is a modern luxury, but antiquity had us beat by thousands of years. The ancient Greeks loved their gymnasiums…
Discover more
Why matchboxes moved the dangerous chemical
Starting a simple fire in the early 1800s was a game of complete chance. Early friction matches were coated in volatile phosphorus that could easily ignite in…
Discover more
When walking canes were status symbols
The humble walking stick had a long run as an arrogant fashion accessory before it actually helped anyone walk. For centuries, carrying an ornate cane was…
Discover more
When contact lenses were made of glass
Before soft, breathable silicone became the standard, people genuinely thought putting heavy glass directly onto their corneas was a stellar idea. Invented in…
Discover more
Charles Dickens wrote masterpieces at a standing desk
The annoying guy in your office who won't stop bragging about his elevated workstation is actually participating in a very old tradition. Famous creatives…
Discover more
Braille began as a military system for reading in the dark
The revolutionary tactile reading system for the blind started as a completely failed military stealth project. Napoleon demanded a way for soldiers to read…
Discover more
Tongue depressors were once reused between patients
The wooden stick that gets uncomfortably shoved to the back of your throat used to be a prized, permanent tool. In the nineteenth century, practitioners…
Discover more
Why surgeons wear green instead of red
Those ubiquitous green and blue scrub suits aren't just a fun stylistic choice by uniform designers. Staring at bright red messes all day causes intense…
Discover more
Why sailors wore heavy gold earrings
Those classic pirate aesthetic hoops weren't just a bold maritime fashion choice. Sailors pierced themselves with heavy precious metals to arrogantly display…
Discover more