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Capsule of the Day

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 byinfrastructureClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
Fact

Roads

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

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

The Electricity Grid

The network generating, transmitting and distributing electrical power. It is the largest machine ever built, it must balance supply and demand…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Public Transport

Shared passenger transport available to the general public on fixed routes and schedules. Its economics differ fundamentally from private transport,…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Sewage Treatment

The process of removing contaminants from wastewater before returning it to the environment. It is among the least discussed and most consequential…

byCapsule0 votes0 reviewsAug 5, 2026