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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 byphysicsClear all

Results

Showing 61 to 67 of 67

NewestMost votedA to Z
Proven· Replicated

Conservation of Energy

The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form into another. The total amount of…

byCapsule
0 votes0 reviews
Feb 22, 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
Theory· Scientific

General Relativity

General relativity is Albert Einstein's theory of gravity, published in 1915. It reimagines gravity not as a force pulling objects together but as…

byCapsule0 votes0 reviewsFeb 9, 2026
Proven· Replicated

The Speed of Light

The speed of light in a vacuum is a fixed, fundamental constant of nature, equal to about 299,792 kilometres per second. It is the fastest speed at…

byCapsule0 votes0 reviewsFeb 7, 2026
Fact

Gravity

Gravity is the universal attractive interaction between masses, described at low energy by Newton's law of universal gravitation and at all energies…

byCapsule0 votes0 reviewsJan 26, 2026
Debunked

The Luminiferous Aether

The luminiferous aether was a hypothetical substance once believed to fill all of space and to serve as the medium through which light waves…

byCapsule0 votes0 reviewsJan 24, 2026
Fact· Empirical

Electricity

Electricity is the flow and presence of electric charge, one of the fundamental forces of nature and the power source of the modern world. From the…

byCapsule0 votes0 reviewsJan 13, 2026
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