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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 bydevelopmentClear all

Results

Showing 1 to 10 of 10

NewestMost votedA to Z
molecular biology
Fact

Gene Regulation

The control of which genes are expressed, when, and how strongly. Every cell in an organism carries the same genome, so what distinguishes a neuron…

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genetics
Fact

Sex Determination

The mechanisms by which an organism develops as male, female or another form. The systems are far more varied than the mammalian arrangement…

byCapsule0 votes0 reviews
sociology
Fact

Urbanisation

The shift of a population from rural to urban living. More than half the world's people now live in cities, a threshold crossed around 2007, and the…

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education
Fact

Literacy

The ability to read and write. It is a comparatively recent condition for most of humanity, it was achieved unevenly and rapidly, and it changes the…

byCapsule0 votes0 reviews
sociology
Theory

The Demographic Transition

The observed pattern in which societies move from high birth and death rates to low ones, passing through a period of rapid population growth while…

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psychology
Theory

Theory of Mind

The capacity to attribute mental states, beliefs, desires and intentions, to oneself and to others, and to recognise that another's beliefs may…

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medicine
Hypothesis

Developmental Origins of Health and Disease

The proposal that conditions in the womb and in early infancy set a person's risk of heart disease, diabetes and other conditions decades later. It…

byCapsule0 votes0 reviews
biology
Proven

Apoptosis

Cells kill themselves on instruction, following a controlled programme that dismantles them tidily. It builds bodies by removing what is not needed,…

byCapsule0 votes0 reviews
agriculture
Contested

The Green Revolution

Between the 1950s and the 1980s, new crop varieties and the inputs they required roughly tripled cereal production across much of Asia and Latin…

byCapsule0 votes0 reviews
linguistics
Contested

The Critical Period Hypothesis

The critical period hypothesis holds that there is a window early in life during which language is acquired readily and after which full acquisition…

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