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Capsule of the Day

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

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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byFactClear all

Results

Showing 141 to 160 of 599

NewestMost votedA to Z
science
Fact

Peer Review

The evaluation of scholarly work by others in the same field before publication. It is the central quality mechanism of academic publishing, it is…

byCapsule
0 votes0 reviews
religion
Fact

Monasticism

The practice of withdrawing from ordinary society to live under religious discipline, usually in community and usually under vows. It arose…

byCapsule0 votes0 reviews
quantum physics
Fact

The Uncertainty Principle

The result that certain pairs of physical properties cannot both have precisely defined values at the same time. It is a statement about what quantum…

byCapsule0 votes0 reviews
political science
Fact

Elections

Procedures for selecting officeholders by vote. The rules by which votes are converted into outcomes are not neutral machinery: different systems…

byCapsule0 votes0 reviews
paleontology
Fact

Trilobites

An extinct class of marine arthropods that existed for roughly 270 million years, left an exceptionally rich fossil record, and are among the most…

byCapsule0 votes0 reviews
nutrition
Fact

Dietary Fibre

The parts of plant food that human digestive enzymes cannot break down. It supplies no energy directly and is one of the more consistently supported…

byCapsule0 votes0 reviews
neuroscience
Fact

Neurotransmitters

The chemicals nerve cells use to signal to one another across synapses. They are the point at which the nervous system becomes chemical rather than…

byCapsule0 votes0 reviews
music
Fact

Musical Instruments

Objects made or adapted to produce musical sound. They are among the oldest artefacts of human culture, and the ways they are classified reveal how…

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
media studies
Fact

Propaganda

Communication designed to shape opinion and behaviour in the interest of the party producing it, rather than to inform. It is defined by purpose and…

byCapsule0 votes0 reviews
materials science
Fact

Glass

A solid that lacks the ordered internal arrangement of a crystal, formed by cooling a liquid fast enough that its atoms cannot arrange themselves. It…

byCapsule0 votes0 reviews
literature
Fact

Poetry

Language organised for its sound and rhythm as well as its meaning. It is older than prose literature, older than writing, and its formal constraints…

byCapsule0 votes0 reviews
linguistics
Fact

Translation

Rendering meaning from one language into another. It is never a mechanical substitution of words, because languages divide the world differently, and…

byCapsule0 votes0 reviews
law
Fact

Constitutions

The fundamental rules establishing how a state is governed: which institutions exist, what powers they hold, how those powers are limited, and how…

byCapsule0 votes0 reviews
immunology
Fact

Antibodies

Proteins produced by the immune system that bind specifically to a target and mark it for removal. Their variety is generated at random before any…

byCapsule0 votes0 reviews
genetics
Fact

Mutation

A change in the sequence of an organism's DNA. Mutations are the ultimate source of all genetic variation, most have no effect, some cause disease,…

byCapsule0 votes0 reviews
film
Fact

Documentary Film

Film presenting factual material about real events and people. The form is as old as cinema itself, and the question of how far a documentary…

byCapsule0 votes0 reviews
epidemiology
Fact

Contact Tracing

Identifying the people an infected person may have exposed, so they can be tested, treated or asked to isolate before they infect others. It is a…

byCapsule0 votes0 reviews
education
Fact

Numeracy

The ability to understand and work with numbers in practical situations. It is distinct from mathematical education, it is measured internationally,…

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
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