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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 byFactphysicsClear all

Results

Showing 1 to 20 of 20

NewestMost votedA to Z
Fact

Radio

Communication using electromagnetic waves without a conductor between sender and receiver. It was the first medium to reach a mass audience…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

Timekeeping

Measuring the passage of time and dividing it into units. Every method works by counting something that repeats regularly, and the history of the…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Quantum Spin

An intrinsic form of angular momentum carried by particles, with no counterpart in classical physics. Nothing is rotating, the quantity is quantised,…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Climate Models

Computer simulations of the climate system, built from physical laws and used to understand past climate and project future change. They are the…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

The Uncertainty Principle

The result that certain pairs of physical properties cannot both have precisely defined values at the same time. It is a statement about what quantum…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Calculus

The mathematics of continuous change, comprising the differential calculus of rates and the integral calculus of accumulation, and the theorem…

byCapsule0 votes0 reviewsAug 5, 2026
Fact· Historical

The Manhattan Project

The Manhattan Project was a secret American research effort during World War II that produced the first atomic bombs. A vast scientific and…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

The Large Hadron Collider

The Large Hadron Collider, or LHC, is the world's largest and most powerful particle accelerator, built by the European laboratory CERN near Geneva.…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Empirical

Quantum Computing

Quantum computing is a new kind of computing that harnesses the strange rules of quantum mechanics to process information in ways ordinary computers…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Isaac Newton

Isaac Newton (1642 to 1727) was an English mathematician and physicist, widely regarded as one of the greatest scientists who ever lived. His…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Empirical

The Northern Lights

The northern lights, known scientifically as the aurora borealis, are one of nature's most spectacular displays. Shimmering curtains of green, pink,…

byCapsule0 votes0 reviewsMay 28, 2026
Fact· Empirical

The Sun

The Sun is the star at the centre of the Solar System, a vast sphere of hot plasma whose gravity holds the planets in their orbits and whose light…

byCapsule0 votes0 reviewsMay 1, 2026
Fact· Empirical

Rainbow

A rainbow is a band of colour that appears in the sky when sunlight is bent and split by water droplets in the air. Familiar and beloved across every…

byCapsule0 votes0 reviewsApr 14, 2026
Fact· Empirical

Lightning

Lightning is a sudden, powerful discharge of electricity in the atmosphere, one of nature's most dramatic and dangerous phenomena. A single bolt can…

byCapsule0 votes0 reviewsApr 3, 2026
Fact· Empirical

Black Hole

A black hole is a region of space where gravity is so intense that nothing, not even light, can escape once it passes a certain boundary. They are…

byCapsule0 votes0 reviewsMar 19, 2026
Fact· Empirical

The Atom

The atom is the basic building block of ordinary matter, the smallest unit of a chemical element that retains its properties. Everything you can see…

byCapsule0 votes0 reviewsFeb 11, 2026
Fact· Historical

Albert Einstein

Albert Einstein was a German born theoretical physicist widely regarded as one of the greatest scientists of all time. Born in 1879 in Ulm, he…

byCapsule0 votes0 reviewsJan 30, 2026
Fact· Historical

Marie Curie

Marie Curie was a Polish born physicist and chemist who conducted pioneering research on radioactivity, a term she coined. Born Maria Skłodowska in…

byCapsule0 votes0 reviewsJan 30, 2026
Fact

Gravity

Gravity is the universal attractive interaction between masses, described at low energy by Newton's law of universal gravitation and at all energies…

byCapsule0 votes0 reviewsJan 26, 2026
Fact· Empirical

Electricity

Electricity is the flow and presence of electric charge, one of the fundamental forces of nature and the power source of the modern world. From the…

byCapsule0 votes0 reviewsJan 13, 2026