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 byenergyClear all

Results

Showing 1 to 17 of 17

NewestMost votedA to Z
chemistry
Fact

The Battery

A device storing energy chemically and releasing it as electric current. It made electricity portable, and its energy density is the constraint…

byCapsule
0 votes0 reviews
engineering
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 reviews
quantum physics
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 reviews
nutrition
Fact

Carbohydrates

A class of molecules made of carbon, hydrogen and oxygen, comprising sugars, starches and fibre. They are the main energy source in most human diets…

byCapsule0 votes0 reviews
ecology
Fact

Food Webs

The network of feeding relationships in an ecosystem. It describes who eats whom, and because energy is lost at every transfer, it explains why large…

byCapsule0 votes0 reviews
biochemistry
Fact

Metabolism

The complete set of chemical reactions that sustain a living organism. It extracts energy from the environment, builds and maintains structures, and…

byCapsule0 votes0 reviews
engineering
Fact

The Internal Combustion Engine

An engine in which fuel burns inside the working chamber, pushing a piston or turning a rotor directly. It displaced the steam engine because it is…

byCapsule0 votes0 reviews
chemistry
Fact

Combustion

The rapid reaction of a fuel with an oxidant that releases heat and usually light. It is the oldest technology humans control, it still supplies most…

byCapsule0 votes0 reviews
physics
Proven

The Carnot Cycle

An idealised sequence of four reversible steps that a heat engine could in principle follow, and which no real engine can beat. Its efficiency…

byCapsule0 votes0 reviews
chemistry
Proven

Electrolysis

Using an electric current to drive a chemical reaction that would not happen on its own. It is the reverse of a battery, and it is how aluminium,…

byCapsule0 votes0 reviews
biochemistry
Proven

The Krebs Cycle

The central sequence of reactions by which cells extract energy from food. It runs in nearly every organism that uses oxygen, it is the hub where the…

byCapsule0 votes0 reviews
biology
Hypothesis

The Disposable Soma Theory

The proposal that organisms age because it is not worth the energy to maintain a body indefinitely when something will kill it anyway. It explains…

byCapsule0 votes0 reviews
physics
Proven

Nuclear Fission

Splitting a heavy nucleus releases about a hundred million times more energy per atom than a chemical reaction. It was discovered by accident in…

byCapsule0 votes0 reviews
quantum physics
Proven

Quantum Tunnelling

A particle can pass through a barrier it does not have enough energy to climb. This has no classical analogue, it is measured routinely, and it is…

byCapsule0 votes0 reviews
materials science
Contested

Room-Temperature Superconductors

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

byCapsule0 votes0 reviews
physics
Theory

Thermodynamics

Thermodynamics is the branch of physics concerned with heat, energy, and work, and how they transform from one form to another. Its laws are among…

byCapsule0 votes0 reviews
physics
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 reviews