Capsule
DonateLog inCreate account
Menu

Navigation

  • Main page
  • Capsules
  • Learning
  • Mapping
  • Rankings
  • Organizations
  • Create
  • Forums
  • Research

Interaction

  • Messages
  • Verify
  • Help
  • About Capsule

Display

Appearance

Environment

EnvironmentsDefault
Capsule
Log in

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.

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byFactClear all

Results

Showing 61 to 80 of 599

NewestMost votedA to Z
Fact

Aviation

Powered flight through the atmosphere. It went from first sustained flight to routine intercontinental travel within sixty years, and its safety…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

The Electricity Grid

The network generating, transmitting and distributing electrical power. It is the largest machine ever built, it must balance supply and demand…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Railways

Vehicles running on fixed guided tracks. The essential idea is older than the steam engine, and what railways did to distance, time and settlement…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Housing

Dwellings and the systems producing and allocating them. Housing is simultaneously shelter, the largest household expense in most countries, and the…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Units of Measurement

Defined quantities against which other quantities are compared. Their standardisation is a precondition for trade, engineering and science, and the…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Religious Festivals

Recurring celebrations marking events in a religious calendar. They structure time, transmit tradition, and are among the most widely observed…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

The Photon

The quantum of the electromagnetic field, the smallest possible amount of light at a given frequency. It has no mass, always travels at the speed of…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Federalism

A system in which authority is divided between a central government and regional governments, each with powers that the other cannot unilaterally…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Ethics

The systematic study of how one ought to act. It asks what makes an action right, what makes a life good, and what grounds those judgements, and its…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Plankton

Organisms that drift in water rather than swimming against currents. They include the base of the marine food web and produce a large share of the…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Gene Regulation

The control of which genes are expressed, when, and how strongly. Every cell in an organism carries the same genome, so what distinguishes a neuron…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Viruses

Infectious agents consisting of genetic material inside a protein coat, which reproduce only inside living cells. They are the most numerous…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Censorship

The suppression of speech, writing or images by an authority. It is as old as writing, its methods have changed with each communication technology,…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Medical Screening

Testing people without symptoms to detect disease early. It saves lives in specific programmes and causes harm in others, and distinguishing between…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Weather Forecasting

Predicting atmospheric conditions from measurements of the present state. It became genuinely accurate only in the past few decades, and its…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Organised Crime

Criminal activity carried out by durable groups organised for profit. It differs from individual offending in being structured, continuing beyond its…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

The Carbon Cycle

The movement of carbon between the atmosphere, oceans, land and rock. It operates on two timescales that differ by a factor of millions, and human…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Synthetic Biology

The design and construction of biological systems that do not exist in nature, treating cells as programmable manufacturing platforms. It applies…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Hormones

Chemical messengers released into the bloodstream by one tissue to act on another. They coordinate processes across the whole body over minutes to…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Galaxies

Gravitationally bound systems of stars, gas, dust and dark matter. They are the units in which the visible matter of the universe is organised, and…

byCapsule0 votes0 reviewsAug 5, 2026
Previous123456…30Next