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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 byneurosciencebiologyClear all

Results

Showing 1 to 7 of 7

NewestMost votedA to Z
Fact

The Neuron

The cell type that carries and processes signals in the nervous system. Neurons are electrically excitable, connect to one another at junctions…

byCapsule
0 votes0 reviews
Aug 5, 2026
Contested

Why We Sleep

Sleep is universal among animals with nervous systems, is regulated with precision, and is fatal to eliminate. What it is for remains unresolved, and…

byCapsule0 votes0 reviewsAug 4, 2026
Proven

The Blood-Brain Barrier

A selective barrier separating the brain's blood supply from its tissue, admitting what neurons need and excluding almost everything else. It…

byCapsule0 votes0 reviewsAug 4, 2026
Proven

Colour Vision

Colour is not a property of light. It is what the visual system computes from the responses of three receptor types, and the computation is what…

byCapsule0 votes0 reviewsAug 3, 2026
Proven

The Action Potential

The electrical pulse a nerve cell uses to signal. It is the unit of communication in every nervous system, its mechanism is understood in…

byCapsule0 votes0 reviewsAug 3, 2026
Theory

Neuroplasticity

Neuroplasticity is the brain's capacity to change its structure and function in response to experience, injury, and learning. It overturned a…

byCapsule0 votes0 reviewsAug 3, 2026
Contested

Mirror Neurons

Mirror neurons are cells that fire both when an animal performs an action and when it observes the same action performed by another. They were…

byCapsule0 votes0 reviewsAug 3, 2026