Donate Log in Create account

Menu

Navigation

Main page
Capsules
Learning
Mapping
Rankings
Organizations
Create
Forums
Research

Interaction

Messages
Verify
Help
About Capsule

Display

Appearance

Environment

EnvironmentsDefault

Navigation

Main page
Capsules
Learning
Mapping
Rankings
Organizations
Create
Forums
Research

Interaction

Messages
Verify
Feedback
Help
About Capsule

Truth Classification

Fact
Theory
Hypothesis
Proven
Contested
Debunked

How classification works

Capsule of the Day

DebunkedThe PolygraphThe instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance dur…

New in the Library

FactTardigrade
FactMonarch Butterfly
FactSpider

Capsule

© 2026 Solis Holdings Group Inc. All rights reserved.

Built by Solis Dev, a technology studio operating under Solis Holdings Group Inc.

Policy
Terms of Use
Methodology
Corrections
Non-partisanship
Transparency
Developers
About
Discord
Sitemap

Capsule, the capsule-pill mark, and the clock logo are trademarks of Solis Holdings Group Inc. All content, source code, and design assets are the exclusive property of Solis Holdings Group Inc., unless otherwise noted. Unauthorized reproduction is prohibited.

The library

Capsules

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

All1,028 Fact599 Proven130 Theory89 Hypothesis71 Contested90 Debunked48

geography236 biology88 physics67 history54 medicine45 astronomy33 psychology26 mathematics26 chemistry20 engineering20 astrophysics19 neuroscience19 anthropology18 art18

Filtered byContested Clear all

Results

Showing 21 to 40 of 90

Newest Most voted A to Z

The Historical Jesus

The attempt to describe Jesus of Nazareth using the methods historians apply to any other figure of antiquity, setting aside theological claims. That…

0 votes0 reviews

Aug 3, 2026

The Green Revolution

Between the 1950s and the 1980s, new crop varieties and the inputs they required roughly tripled cereal production across much of Asia and Latin…

byCapsule0 votes0 reviewsAug 3, 2026

Brutalism

Brutalism is a postwar architectural movement built around exposed structure and raw concrete. It produced buildings that are among the most admired…

byCapsule0 votes0 reviewsAug 3, 2026

Absolute Pitch

Absolute pitch, commonly called perfect pitch, is the ability to identify or produce a musical note without a reference tone. It is rare, it is real,…

byCapsule0 votes0 reviewsAug 3, 2026

Democratic Peace Theory

Democratic peace theory holds that democracies do not, or almost never, go to war with one another. It is among the strongest empirical regularities…

byCapsule0 votes0 reviewsAug 3, 2026

Mirror Neurons

Mirror neurons are cells that fire both when an animal performs an action and when it observes the same action performed by another. They were…

byCapsule0 votes0 reviewsAug 3, 2026

Trophic Cascades

A trophic cascade occurs when a change at one level of a food web propagates down through the levels beneath it. The mechanism is real and…

byCapsule0 votes0 reviewsAug 3, 2026

The Replication Crisis

The replication crisis is the finding that a substantial share of published research results cannot be reproduced when the studies are repeated. It…

byCapsule0 votes0 reviewsAug 3, 2026

Statistical Significance

Statistical significance is a threshold used to decide whether a result is worth taking seriously. The conventional cutoff, a p-value below 0.05,…

byCapsule0 votes0 reviewsAug 3, 2026

Room-Temperature Superconductors

A material that conducted electricity with no resistance at ordinary temperatures and pressures would be genuinely transformative, eliminating losses…

byCapsule0 votes0 reviewsAug 3, 2026

Graphene

Graphene is a single layer of carbon atoms arranged in a hexagonal lattice, one atom thick. Its measured properties are extraordinary and not in…

byCapsule0 votes0 reviewsAug 3, 2026

The Hygiene Hypothesis

The hygiene hypothesis is the proposal that reduced exposure to microbes in early childhood leaves the immune system poorly calibrated, and that this…

byCapsule0 votes0 reviewsAug 3, 2026

Climate Tipping Points

A climate tipping point is a threshold beyond which part of the Earth system shifts into a different state, and does not shift back when the forcing…

byCapsule0 votes0 reviewsAug 3, 2026

Climate Sensitivity

Climate sensitivity is the amount of warming that follows from doubling the concentration of carbon dioxide in the atmosphere. It is the single…

byCapsule0 votes0 reviewsAug 3, 2026

The Heritability of Intelligence

How much of the variation in measured intelligence is attributable to genetic variation is among the most technically misunderstood questions in…

byCapsule0 votes0 reviewsAug 3, 2026

Junk DNA

Only a small fraction of the human genome codes for proteins, something under two per cent. What the rest of it is doing has been argued about for…

byCapsule0 votes0 reviewsAug 3, 2026

The Indus Script

The Indus Valley Civilisation left behind thousands of inscribed objects, mostly small stone seals, carrying sequences of signs that nobody can read.…

byCapsule0 votes0 reviewsAug 3, 2026

Gobekli Tepe

Gobekli Tepe is a complex of monumental stone enclosures in southeastern Turkey, built around eleven thousand years ago by people who had not yet…

byCapsule0 votes0 reviewsAug 3, 2026

Dunbar's Number

Dunbar's number is the proposal that humans can maintain roughly 150 stable social relationships, and that the limit is set by the size of the brain.…

byCapsule0 votes0 reviewsAug 3, 2026

Cultural Relativism

Cultural relativism is the principle that a culture should be understood on its own terms rather than judged against the standards of another. It…

byCapsule0 votes0 reviewsAug 3, 2026

Previous1 2 3 4 5Next