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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 byTheoryastronomyClear all

Results

Showing 1 to 6 of 6

NewestMost votedA to Z
earth science
Theory

Milankovitch Cycles

The proposal that ice ages are paced by slow, predictable variations in Earth's orbit and axial orientation, which redistribute sunlight across…

byCapsule
0 votes0 reviews
astrophysics
Theory· Scientific

Stellar Nucleosynthesis

Stellar nucleosynthesis is the theory explaining where the chemical elements come from. It holds that the stars are the furnaces in which almost all…

byCapsule0 votes0 reviews
astrophysics
Theory· Scientific

The Formation of the Solar System

The nebular hypothesis is the accepted scientific theory of how the Sun and its planets formed. It holds that the entire Solar System condensed,…

byCapsule0 votes0 reviews
astrophysics
Theory

Stellar Evolution

Stellar evolution is the scientific account of how stars are born, live, and die over millions or billions of years. Though no one can watch a single…

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