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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 bymedicinetechnologyClear all

Results

Showing 1 to 2 of 2

NewestMost votedA to Z
Fact

Surgery

Treatment by physical intervention in the body. Surgery was limited for millennia not by knowledge of anatomy but by three specific obstacles, and…

byCapsule
0 votes0 reviews
Aug 5, 2026
Proven

Magnetic Resonance Imaging

A way of photographing the inside of a living body in any plane, at high resolution, without ionising radiation, by making hydrogen nuclei resonate…

byCapsule0 votes0 reviewsAug 3, 2026