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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 byhypothesisClear all

Results

Showing 1 to 16 of 16

NewestMost votedA to Z
Hypothesis

Is Time Travel Possible?

Time travel, journeying into the past or the future, is a staple of science fiction, but is it actually possible? The surprising answer from physics…

byCapsule
0 votes0 reviews
Jun 12, 2026
Hypothesis

The Drake Equation

The Drake equation is a famous formula that estimates how many communicating alien civilizations might exist in our galaxy. It is less a precise…

byCapsule0 votes0 reviewsJun 12, 2026
Hypothesis

The Aquatic Ape Hypothesis

The aquatic ape hypothesis is the controversial idea that human ancestors went through a phase of living partly in water, and that this shaped many…

byCapsule0 votes0 reviewsJun 12, 2026
Hypothesis

Grand Unified Theory

A Grand Unified Theory is a hypothesized framework that would merge three of the fundamental forces of nature, the electromagnetic, weak, and strong…

byCapsule0 votes0 reviewsJun 12, 2026
Hypothesis

Snowball Earth

Snowball Earth is the hypothesis that, on one or more occasions in the distant past, our planet froze over almost completely, with ice reaching from…

byCapsule0 votes0 reviewsJun 12, 2026
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 reviewsJun 12, 2026
Hypothesis

The Simulation Hypothesis

The simulation hypothesis is the proposal that the reality we experience might actually be an artificial simulation, such as an immensely…

byCapsule0 votes0 reviewsMay 20, 2026
Hypothesis

Panspermia

Panspermia is the hypothesis that life exists throughout the universe and is spread between worlds by space dust, meteoroids, asteroids, and comets.…

byCapsule0 votes0 reviewsMay 17, 2026
Hypothesis

The Gaia Hypothesis

The Gaia hypothesis proposes that life and its physical environment on Earth form a single, self regulating system that keeps the planet suitable for…

byCapsule0 votes0 reviewsMay 4, 2026
Hypothesis

Planet Nine

Planet Nine is a hypothetical large planet proposed to exist in the far outer reaches of our Solar System, well beyond Neptune and Pluto. It has…

byCapsule0 votes0 reviewsApr 18, 2026
Hypothesis

The Rare Earth Hypothesis

The Rare Earth hypothesis proposes that complex, multicellular life, of the kind found on Earth, is extremely rare in the universe, because it…

byCapsule0 votes0 reviewsApr 8, 2026
Hypothesis

The Riemann Hypothesis

The Riemann hypothesis is the most famous unsolved problem in mathematics. Proposed by Bernhard Riemann in 1859, it makes a precise claim about the…

byCapsule0 votes0 reviewsMar 26, 2026
Hypothesis

The Dyson Sphere

A Dyson sphere is a hypothetical megastructure that an extremely advanced civilization might build around a star to capture a large share of its…

byCapsule0 votes0 reviewsMar 8, 2026
Hypothesis

Wormholes

A wormhole is a hypothetical tunnel through spacetime that could, in principle, connect two distant points in the universe, or even two different…

byCapsule0 votes0 reviewsFeb 26, 2026
Hypothesis

Abiogenesis: The Origin of Life

Abiogenesis is the natural process by which life is thought to have arisen from non living matter, such as simple chemical compounds. How life first…

byCapsule0 votes0 reviewsFeb 15, 2026
Hypothesis

Goldbach's Conjecture

Goldbach's conjecture is one of the oldest and simplest sounding unsolved problems in mathematics. It states that every even whole number greater…

byCapsule0 votes0 reviewsJan 26, 2026