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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 bycosmologyClear all

Results

Showing 1 to 6 of 6

NewestMost votedA to Z
astronomy
Proven

The Expansion of the Universe

Distant galaxies recede from us, and the further away they are the faster they go. The observation established that the universe has a history rather…

byCapsule
0 votes0 reviews
astrophysics
Hypothesis

Modified Newtonian Dynamics

Galaxies rotate faster at their edges than the visible matter can explain. The standard answer is that unseen dark matter supplies the extra gravity.…

byCapsule0 votes0 reviews
astrophysics
Contested

The Hubble Tension

The Hubble tension is a genuine and growing puzzle in cosmology: two careful ways of measuring how fast the universe is expanding give answers that…

byCapsule0 votes0 reviews
astrophysics
Hypothesis

Cosmic Inflation

Cosmic inflation is the hypothesis that, in the first tiny fraction of a second after the Big Bang, the universe expanded at an almost unimaginable…

byCapsule0 votes0 reviews
physics
Theory

Dark Matter: The Leading Theoretical Framework for Missing Mass in the Universe

Dark matter is the leading theoretical framework proposed to explain gravitational effects observed in galaxies and galaxy clusters that cannot be…

byCapsule0 votes0 reviews
astronomy
Theory· Scientific

The Big Bang

The Big Bang is the prevailing cosmological theory of how the universe began. It holds that the universe started about 13.8 billion years ago in an…

byCapsule0 votes0 reviews