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DebunkedThe PolygraphThe instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance dur…

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The library

Capsules

1,028 capsules, each one classified by the strength of its evidence.

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byhistoryClear all

Results

Showing 161 to 172 of 172

NewestMost votedA to Z
Fact

The Founding and Agricultural Development of Brandon, Manitoba

Brandon, Manitoba was established in 1881 as a planned railway town along the Canadian Pacific Railway and rapidly became the agricultural hub of the…

byCapsule
0 votes0 reviews
Feb 25, 2026
Fact· Empirical

Great Pyramid of Giza

The Great Pyramid of Giza is the largest of the Egyptian pyramids and the oldest of the Seven Wonders of the Ancient World, and the only one still…

byCapsule0 votes0 reviewsFeb 24, 2026
Fact· Empirical

Great Wall of China

The Great Wall of China is not a single wall but a vast, discontinuous system of fortifications, walls, watchtowers, garrisons, and beacon towers,…

byCapsule0 votes0 reviewsFeb 17, 2026
Debunked

Phlogiston Theory

Phlogiston theory was an early explanation of combustion, widely accepted in the seventeenth and eighteenth centuries. It held that all flammable…

byCapsule0 votes0 reviewsFeb 15, 2026
Debunked

The Geocentric Model

The geocentric model was the ancient belief that the Earth sits motionless at the center of the universe, with the Sun, Moon, planets, and stars all…

byCapsule0 votes0 reviewsFeb 15, 2026
Debunked

The Martian Canals

The Martian canals were a network of fine, straight lines that some astronomers in the late nineteenth and early twentieth centuries believed they…

byCapsule0 votes0 reviewsFeb 11, 2026
Fact· Historical

Nikola Tesla

Nikola Tesla was an inventor and electrical engineer best known for his pioneering contributions to the alternating current electrical system that…

byCapsule0 votes0 reviewsFeb 4, 2026
Fact· Empirical

Taj Mahal

The Taj Mahal is a white marble mausoleum in Agra, India, widely regarded as one of the most beautiful buildings in the world. Built in the…

byCapsule0 votes0 reviewsFeb 3, 2026
Fact· Historical

Albert Einstein

Albert Einstein was a German born theoretical physicist widely regarded as one of the greatest scientists of all time. Born in 1879 in Ulm, he…

byCapsule0 votes0 reviewsJan 30, 2026
Fact· Historical

Marie Curie

Marie Curie was a Polish born physicist and chemist who conducted pioneering research on radioactivity, a term she coined. Born Maria Skłodowska in…

byCapsule0 votes0 reviewsJan 30, 2026
Debunked

Bloodletting

Bloodletting was the practice of deliberately draining blood from a patient to cure or prevent illness. For more than two thousand years it was one…

byCapsule0 votes0 reviewsJan 25, 2026
Debunked

The Luminiferous Aether

The luminiferous aether was a hypothetical substance once believed to fill all of space and to serve as the medium through which light waves…

byCapsule0 votes0 reviewsJan 24, 2026
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