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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 byengineeringhistoryClear all

Results

Showing 1 to 7 of 7

NewestMost votedA to Z
Fact

Canals

Artificial waterways for navigation. Water carries heavy loads at a fraction of the effort land transport requires, and for a period of roughly a…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

Roads

Prepared routes for travel over land. Roads are the oldest large-scale infrastructure, the engineering problem they solve is drainage rather than…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Navigation

Determining position and finding a route. For most of history the difficult part was not direction but position, and specifically longitude, which…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Aviation

Powered flight through the atmosphere. It went from first sustained flight to routine intercontinental travel within sixty years, and its safety…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Railways

Vehicles running on fixed guided tracks. The essential idea is older than the steam engine, and what railways did to distance, time and settlement…

byCapsule0 votes0 reviewsAug 5, 2026
Fact· Historical

The Wright Brothers' First Flight

On 17 December 1903, near Kitty Hawk, North Carolina, the brothers Orville and Wilbur Wright achieved the first sustained, controlled flight of a…

byCapsule0 votes0 reviewsJun 11, 2026
Fact· Historical

The Internet

The Internet is a global system of interconnected computer networks that lets billions of devices around the world communicate and share information.…

byCapsule0 votes0 reviewsJun 11, 2026