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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 byFactecologyClear all

Results

Showing 1 to 16 of 16

NewestMost votedA to Z
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
Aug 7, 2026
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 reviewsAug 7, 2026
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 reviewsAug 5, 2026
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 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

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 reviewsAug 5, 2026
Fact

Soil

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

byCapsule0 votes0 reviewsAug 5, 2026
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 reviewsAug 5, 2026
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 reviewsAug 5, 2026
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 reviewsAug 5, 2026
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 reviewsAug 5, 2026
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 reviewsAug 5, 2026
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 reviewsAug 5, 2026
Fact· Empirical

Amazon Rainforest

The Amazon Rainforest is the largest tropical rainforest on Earth, a vast sea of green covering some 5.5 million square kilometres across nine South…

byCapsule0 votes0 reviewsMay 14, 2026
Fact· Empirical

Domestic Cat

The domestic cat, Felis catus, is the most numerous small carnivore on Earth, with something over six hundred million individuals. It is also barely…

byCapsule0 votes0 reviewsFeb 26, 2026
Fact· Empirical

Great Barrier Reef

The Great Barrier Reef is the world's largest coral reef system, stretching more than 2,300 kilometres along the north-east coast of Australia. So…

byCapsule0 votes0 reviewsJan 19, 2026