History
Discover facts about history. Small discoveries that change the way you see familiar things.
History

Surgeon Who Operated on Himself: In 1961, alone in Antarctica, Leonid Rogozov felt the ache of appendicitis — no plane could reach him.
Surgeon Who Operated on Himself: In 1961, alone in Antarctica, Leonid Rogozov felt the ache of appendicitis — no plane could reach him. So he sterilized his…
Discover more
In 1770, an Austrian inventor unveiled a machine called the Turk—a wooden automaton that could supposedly play chess and win.
In 1770, an Austrian inventor unveiled a machine called the Turk—a wooden automaton that could supposedly play chess and win. Crowds gasped as it beat nobles…
Discover more
Paris, 1793.
Paris, 1793. The Revolution promised liberty but invented bureaucracy instead. To track enemies, paper became the new weapon—lists, censuses, denunciations.…
Discover more
In the 1500s, a little-known Florentine engineer named Agostino Ramelli built a “book wheel”—a rotating wooden carousel that let scholars read half a dozen open books at once without moving.
In the 1500s, a little-known Florentine engineer named Agostino Ramelli built a “book wheel”—a rotating wooden carousel that let scholars read half a dozen…
Discover more
Centuries before smartphones, people were obsessed with another handheld device: the portable sundial.
Centuries before smartphones, people were obsessed with another handheld device: the portable sundial. In the 16th century, wealthy travelers carried these…
Discover more
In 1795, the Paris police seized a curious device: a machine that could duplicate signatures almost perfectly.
In 1795, the Paris police seized a curious device: a machine that could duplicate signatures almost perfectly. Its inventor, a forgotten clockmaker named Jean…
Discover moreA bigger world.
One discovery
at a time.
Keep discovering with Stacky. Interesting facts in an app that is always within reach.

Bicycle Soldiers of 1914 — Before tanks and drones, armies experimented with two-wheelers.
Bicycle Soldiers of 1914 — Before tanks and drones, armies experimented with two-wheelers. In World War I, entire battalions pedaled through mud and shrapnel,…
Discover more
When Velvet Was Dangerous: The Class Politics of Color in the Renaissance.
When Velvet Was Dangerous: The Class Politics of Color in the Renaissance. In 15th-century Florence, wearing red or intricate lace could get you fined or even…
Discover more
In 1721, when smallpox stalked Boston, a single enslaved man changed the course of Western medicine.
In 1721, when smallpox stalked Boston, a single enslaved man changed the course of Western medicine. His name was Onesimus, property of preacher Cotton…
Discover more
Before smartphones, the greatest social notification ever invented was the town bell.
Before smartphones, the greatest social notification ever invented was the town bell. In 14th‑century European towns, bell‑ringers acted as the analog…
Discover more
Before smartphones, the Romans built an early social network — via public baths and communal latrines.
Before smartphones, the Romans built an early social network — via public baths and communal latrines. Messages scratched into tiles, trade deals shouted in…
Discover more
During World War II, entire neighborhoods taught children to fold foil because adults said it would help build planes.
During World War II, entire neighborhoods taught children to fold foil because adults said it would help build planes. In truth, most collected foil never…
Discover more
Fines in Salt and Ghost Weddings: In 900 CE China, families occasionally held symbolic marriages between deceased single adults, uniting two spirits to ease family shame over…
Fines in Salt and Ghost Weddings: In 900 CE China, families occasionally held symbolic marriages between deceased single adults, uniting two spirits to ease…
Discover more
In Victorian London, bread turned green.
In Victorian London, bread turned green. The bright hue wasn’t mold — it was copper sulfate, a toxic filler bakers used to make stale flour look fresh. During…
Discover more
In 16th-century Denmark, broken mirrors were fined—a holdover from medieval laws that saw reflections as proof of divine order.
In 16th-century Denmark, broken mirrors were fined—a holdover from medieval laws that saw reflections as proof of divine order. Smash one, and you…
Discover more
There’s a forgotten invention from 1st-century Alexandria that almost launched an industrial revolution two millennia early: Heron’s steam engine.
There’s a forgotten invention from 1st-century Alexandria that almost launched an industrial revolution two millennia early: Heron’s steam engine. It spun…
Discover more
Napoleon in Your Pocket: During his exile, French soldiers sewed miniature portraits of Napoleon into their jacket linings so even in defeat they could 'carry the Emperor close…
Napoleon in Your Pocket: During his exile, French soldiers sewed miniature portraits of Napoleon into their jacket linings so even in defeat they could 'carry…
Discover more
Espresso machine and the printing press share a lineage of pressure—literally.
Espresso machine and the printing press share a lineage of pressure—literally. In 15th‑century Europe, engineers experimenting with beer and wine presses…
Discover more
In 14th‑century Paris, the city watchmen carried hollow, perforated clubs filled with burning herbs to signal hour shifts.
In 14th‑century Paris, the city watchmen carried hollow, perforated clubs filled with burning herbs to signal hour shifts. The sweet-smelling smoke doubled as…
Discover more
Paris, summer of 1871: as revolutionaries barricaded streets, a quiet rebellion sparked under the floorboards.
Paris, summer of 1871: as revolutionaries barricaded streets, a quiet rebellion sparked under the floorboards. Using miles of copper wire, citizens built a…
Discover more
In Victorian England, hats were lethal.
In Victorian England, hats were lethal. Mercury nitrate used to treat felt seeped into workers’ skin, causing tremors, hallucinations, and erratic behavior —…
Discover more
Centuries before Rome was even a rumor, Egyptian engineers lit dark corridors not with fire, but with “chemical sunlight.” Residues found on temple walls hint at copper mirrors,…
Centuries before Rome was even a rumor, Egyptian engineers lit dark corridors not with fire, but with “chemical sunlight.” Residues found on temple walls hint…
Discover more
DRESS THAT TOPPLED A KING — In 1780s France, Queen Marie Antoinette posed wearing a simple white muslin dress for a portrait.
DRESS THAT TOPPLED A KING — In 1780s France, Queen Marie Antoinette posed wearing a simple white muslin dress for a portrait. It looked like linen underwear —…
Discover more
In 19th-century Vienna, the first recorded automatic door was powered by a steam mechanism crafted for a royal greenhouse.
In 19th-century Vienna, the first recorded automatic door was powered by a steam mechanism crafted for a royal greenhouse. Few citizens noticed, but it hinted…
Discover more