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FactSurgeryTreatment by physical intervention in the body. Surgery was limited for millennia not by knowledge of anatomy but by th…

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  • FactTardigrade
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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byProventechnologyClear all

Results

Showing 1 to 6 of 6

NewestMost votedA to Z
Proven

Satellite Navigation

Knowing where you are anywhere on Earth to within a few metres, by timing radio signals from satellites. It works because atomic clocks are…

byCapsule
0 votes0 reviews
Aug 3, 2026
Proven

Error-Correcting Codes

Adding structured redundancy to a message so that errors introduced in storage or transmission can be detected and repaired without asking for a…

byCapsule0 votes0 reviewsAug 3, 2026
Proven

The Laser

A device that produces light in which every wave is in step, travelling in one direction at one wavelength. It was built in 1960 with no application…

byCapsule0 votes0 reviewsAug 3, 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
Proven

The Transistor

A device that lets a small electrical signal control a large one, with no moving parts, made from a crystal. It replaced the vacuum tube, made…

byCapsule0 votes0 reviewsAug 3, 2026
Proven

Quantum Tunnelling

A particle can pass through a barrier it does not have enough energy to climb. This has no classical analogue, it is measured routinely, and it is…

byCapsule0 votes0 reviewsAug 3, 2026