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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 byphysicschemistryClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
Proven

Surface Tension

The tendency of a liquid surface to contract to the smallest possible area, because a molecule at the surface has fewer neighbours to attract it than…

byCapsule
0 votes0 reviews
Aug 4, 2026
Proven

The Ideal Gas Law

One equation relating the pressure, volume, temperature and quantity of a gas. It is an approximation that no real gas obeys exactly, it is accurate…

byCapsule0 votes0 reviewsAug 3, 2026
Proven· Replicated

Radioactive Decay

Radioactive decay is the process by which unstable atomic nuclei spontaneously break down, releasing energy and particles and transforming into other…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Empirical

The Atom

The atom is the basic building block of ordinary matter, the smallest unit of a chemical element that retains its properties. Everything you can see…

byCapsule0 votes0 reviewsFeb 11, 2026