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 byengineeringClear all

Results

Showing 21 to 34 of 34

NewestMost votedA to Z
Proven

Electromagnetic Induction

A changing magnetic field produces an electric current. Michael Faraday demonstrated it in 1831, and essentially all the world's electricity is…

byCapsule
0 votes0 reviews
Aug 4, 2026
Proven

Archimedes' Principle

A body immersed in a fluid is pushed up by a force equal to the weight of the fluid it displaces. It explains why steel ships float, it is over two…

byCapsule0 votes0 reviewsAug 4, 2026
Proven

Satellite Navigation

Knowing where you are anywhere on Earth to within a few metres, by timing radio signals from satellites. It works because atomic clocks are…

byCapsule0 votes0 reviewsAug 3, 2026
Proven

The Transistor

A device that lets a small electrical signal control a large one, with no moving parts, made from a crystal. It replaced the vacuum tube, made…

byCapsule0 votes0 reviewsAug 3, 2026
Theory· Scientific

Metamaterials

A metamaterial gets its properties from its structure rather than its chemistry. By arranging elements smaller than the wavelength of the wave…

byCapsule0 votes0 reviewsAug 3, 2026
Proven· Replicated

Semiconductor Doping

Doping is the deliberate introduction of impurities into a semiconductor in order to control its electrical behaviour. Every transistor, and…

byCapsule0 votes0 reviewsAug 3, 2026
Proven· Replicated

Shape-Memory Alloys

A shape-memory alloy is a metal that returns to a remembered shape when heated, having been deformed while cool. The effect looks like a trick and is…

byCapsule0 votes0 reviewsAug 3, 2026
Theory

Aerodynamics: How Flight Works

Aerodynamics is the study of how air flows around objects and the forces this creates. It is the science that explains how aircraft fly, how cars and…

byCapsule0 votes0 reviewsJun 11, 2026
Fact· Historical

The Wright Brothers' First Flight

On 17 December 1903, near Kitty Hawk, North Carolina, the brothers Orville and Wilbur Wright achieved the first sustained, controlled flight of a…

byCapsule0 votes0 reviewsJun 11, 2026
Fact· Empirical

International Space Station

The International Space Station, or ISS, is a large spacecraft in orbit around the Earth that serves as a home and laboratory for astronauts. The…

byCapsule0 votes0 reviewsMay 31, 2026
Contested

Renewable Energy and Electrical Grid Stability

Wind and solar generation are non-dispatchable and produce zero rotational inertia, raising legitimate concerns about frequency regulation and…

byCapsule0 votes0 reviewsApr 22, 2026
Hypothesis

The Dyson Sphere

A Dyson sphere is a hypothetical megastructure that an extremely advanced civilization might build around a star to capture a large share of its…

byCapsule0 votes0 reviewsMar 8, 2026
Fact· Historical

The Eiffel Tower

The Eiffel Tower is a wrought iron lattice tower in Paris, France, and one of the most recognized structures in the world. Standing about 330 metres…

byCapsule0 votes0 reviewsMar 1, 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
Previous12Next