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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 byFactconstructionClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
Fact

The Dome

A roof formed as a hollow hemisphere or similar curved shell. It spans large spaces without internal supports, it works entirely in compression, and…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

Concrete

A composite of cement, water, sand and stone that begins as a liquid and hardens into artificial rock. It is the most used manufactured material on…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Skyscraper

A very tall multi-storey building, made possible in the late nineteenth century by two technologies arriving together: the steel frame and the safe…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Bridges

Structures that carry a route across an obstacle. There are a small number of structural types, each resolving loads differently, and which is chosen…

byCapsule0 votes0 reviewsAug 5, 2026