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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
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Results

Showing 1 to 4 of 4

NewestMost votedA to Z
archaeology
Fact

Dendrochronology

Dating events and objects by counting and matching the annual growth rings of trees. It is the most precise dating method available for the last…

byCapsule
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genetics
Hypothesis

The Molecular Clock

The proposal that genetic differences accumulate at a roughly constant rate, so counting them dates the split between two lineages. It transformed…

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archaeology
Theory

Stratigraphy

Stratigraphy is the study of layers, and the principle that where deposits lie undisturbed the lower ones were laid down before the upper ones. It…

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archaeology
Proven· Replicated

Radiocarbon Dating

Radiocarbon dating measures how much carbon-14 remains in something that was once alive, and converts that into an age. Developed by Willard Libby in…

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