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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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  • FactTardigrade
  • FactMonarch Butterfly
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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byProvenengineeringengineeringClear all

Results

Showing 1 to 2 of 2

NewestMost votedA to Z
engineering
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
engineering
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 reviews