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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 byProvenexperimentClear all

Results

Showing 1 to 7 of 7

NewestMost votedA to Z
physics
Proven

Rutherford Scattering

Firing alpha particles at gold foil and finding that a few bounced back. The result destroyed the prevailing model of the atom, established that…

byCapsule
0 votes0 reviews
psychology
Proven

The Stroop Effect

Naming the colour a word is printed in becomes markedly harder when the word itself names a different colour. The delay is a few hundred…

byCapsule0 votes0 reviews
physics
Proven

The Double-Slit Experiment

Send particles one at a time through two narrow openings and they build up a pattern that only waves can produce. Watch which opening each one goes…

byCapsule0 votes0 reviews
neuroscience
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 reviews
physics
Proven

Neutrino Oscillation

Neutrinos change identity as they travel, converting between three types. The discovery resolved a thirty-year discrepancy in measurements of the Sun…

byCapsule0 votes0 reviews
physics
Proven

The Michelson-Morley Experiment

In 1887 two men in a basement in Cleveland tried to measure the Earth's motion through the medium light was assumed to travel in. They found nothing.…

byCapsule0 votes0 reviews
quantum physics
Proven

Quantum Entanglement

Two particles can be prepared in a joint state where neither has a definite property of its own, and measuring one immediately fixes the…

byCapsule0 votes0 reviews