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 byecologyClear all

Results

Showing 1 to 20 of 26

NewestMost votedA to Z
biology
Fact· Empirical

Ant

Ants are eusocial insects of the family Formicidae, with over 14,000 described species and an estimated global population around twenty quadrillion…

byCapsule
0 votes0 reviews
biology
Fact· Empirical

Salmon

Salmon are anadromous fish of the family Salmonidae: born in fresh water, grown at sea, and returning to fresh water to spawn, in most cases to the…

byCapsule0 votes0 reviews
agriculture
Fact

Fishing

Catching aquatic animals for food. It is the last major food source still taken from the wild at scale, which is precisely why it is the one where…

byCapsule0 votes0 reviews
agriculture
Fact

Forestry

The management of forests for timber, other products and ecological function. It is among the oldest forms of resource management, and its central…

byCapsule0 votes0 reviews
oceanography
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 reviews
ecology
Fact

Pollination

The transfer of pollen from the male part of a flower to the female part, allowing fertilisation. Most flowering plants depend on animals to do it,…

byCapsule0 votes0 reviews
earth science
Fact

Soil

The layer of weathered mineral material, organic matter, water, air and organisms covering most land surfaces. It supports essentially all…

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
oceanography
Fact

The Deep Sea

The ocean below roughly 200 metres, where sunlight fails. It is the largest habitat on Earth by volume, it is under extreme pressure and permanent…

byCapsule0 votes0 reviews
microbiology
Fact

Fungi

A kingdom of organisms distinct from plants and animals, which digest their food externally and absorb it. They decompose most of the world's dead…

byCapsule0 votes0 reviews
ecology
Fact

Ecological Succession

The sequence of changes in the species occupying a place over time after disturbance or after new ground appears. It is one of the oldest…

byCapsule0 votes0 reviews
oceanography
Fact

Coral Reefs

Structures built by colonial animals from calcium carbonate, occupying a tiny fraction of the ocean floor and supporting a very large share of its…

byCapsule0 votes0 reviews
ecology
Fact

Biodiversity

The variety of life, measured at the level of genes, species and ecosystems. It is unevenly distributed, incompletely catalogued, and declining at a…

byCapsule0 votes0 reviews
archaeology
Contested

The Collapse of Easter Island

Whether the people of Rapa Nui destroyed their own society by deforesting the island, or whether the collapse was caused by European contact, disease…

byCapsule0 votes0 reviews
ecology
Theory

Optimal Foraging Theory

The proposal that animals forage in ways that maximise net energy gained per unit time, because selection favours whatever feeding behaviour leaves…

byCapsule0 votes0 reviews
ecology
Theory

Life History Theory

The framework that treats an organism's schedule of growth, reproduction and death as an evolved allocation of limited resources, subject to…

byCapsule0 votes0 reviews
biology
Hypothesis

Niche Construction

The proposal that organisms do not merely adapt to environments but build them, and that the environments they build become selection pressures for…

byCapsule0 votes0 reviews
biology
Proven

Nitrogen Fixation

Air is nearly eighty percent nitrogen and almost nothing can use it. Breaking the bond that holds the molecule together is what makes proteins and…

byCapsule0 votes0 reviews
oceanography
Proven

Ocean Acidification

The ocean absorbs roughly a quarter of the carbon dioxide released by human activity, and dissolved carbon dioxide makes seawater more acidic. The…

byCapsule0 votes0 reviews
ecology
Contested

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 reviews
Previous12Next