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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
  • FactSpider

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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byProvengeologyClear all

Results

Showing 1 to 2 of 2

NewestMost votedA to Z
Proven

Geomagnetic Reversal

The Earth's magnetic field has flipped hundreds of times, north becoming south and back. The record of those reversals is frozen into the ocean…

byCapsule
0 votes0 reviews
Aug 3, 2026
Proven· Replicated

The Age of the Earth

The Earth is about 4.54 billion years old. This figure, once fiercely debated, is now established with great precision through the radioactive dating…

byCapsule0 votes0 reviewsJun 11, 2026