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Truth Classification

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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.

All1,028 Fact599 Proven130 Theory89 Hypothesis71 Contested90 Debunked48

geography236 biology88 physics67 history54 medicine45 astronomy33 psychology26 mathematics26 chemistry20 engineering20 astrophysics19 neuroscience19 anthropology18 art18

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Results

Showing 521 to 540 of 599

Newest Most voted A to Z

Fact· Historical

Andrew Carnegie

Andrew Carnegie was a Scottish American industrialist who led the enormous expansion of the American steel industry in the late nineteenth century…

byCapsule

0 votes0 reviews

May 29, 2026

Fact· Empirical

Octopus

Octopuses are eight-armed cephalopod molluscs, around three hundred species, found in every ocean. They have three hearts, blue blood, no skeleton,…

byCapsule0 votes0 reviewsMay 28, 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

Polar Bear

The polar bear, Ursus maritimus, is the largest living land carnivore and the only bear classified as a marine mammal. It is a very recent species…

byCapsule0 votes0 reviewsMay 24, 2026

Fact· Historical

Apollo 11

Apollo 11 was the spaceflight that first landed humans on the Moon. On July 20, 1969, the American astronauts Neil Armstrong and Buzz Aldrin walked…

byCapsule0 votes0 reviewsMay 24, 2026

Fact· Empirical

Canada

Canada is a country in North America, the second-largest in the world by total area, stretching from the Atlantic Ocean in the east to the Pacific in…

byCapsule0 votes0 reviewsMay 23, 2026

Fact· Empirical

Saturn

Saturn is the sixth planet from the Sun and the second largest in the Solar System, famous above all for its magnificent rings. A giant ball of gas…

byCapsule0 votes0 reviewsMay 22, 2026

Fact· Empirical

Petra

Petra is an ancient city in southern Jordan, famous for its monumental buildings carved directly into rose-coloured sandstone cliffs. Once the…

byCapsule0 votes0 reviewsMay 22, 2026

Fact· Historical

John D. Rockefeller

John D. Rockefeller was an American business magnate who became the dominant figure in the early oil industry and, by most accounts, the wealthiest…

byCapsule0 votes0 reviewsMay 21, 2026

Fact· Empirical

Amazon Rainforest

The Amazon Rainforest is the largest tropical rainforest on Earth, a vast sea of green covering some 5.5 million square kilometres across nine South…

byCapsule0 votes0 reviewsMay 14, 2026

Fact· Empirical

Volcano

A volcano is an opening in a planet's crust through which molten rock, gas, and ash erupt from the hot interior to the surface. On Earth they are…

byCapsule0 votes0 reviewsMay 13, 2026

Fact· Historical

Katherine Johnson

Katherine Johnson was an American mathematician whose precise calculations of orbital mechanics were critical to the success of the United States'…

byCapsule0 votes0 reviewsMay 10, 2026

Fact

Nitrogen Cycling in Prairie Soils of the Canadian Prairies

Nitrogen cycling in Prairie soils is a well-documented biological and chemical process that determines agricultural productivity across Manitoba,…

byCapsule0 votes0 reviewsMay 9, 2026

Fact

CRISPR-Cas9 Gene Editing: Mechanism and Applications

CRISPR-Cas9 is a programmable nuclease that uses a guide RNA to direct the Cas9 enzyme to a specific genomic sequence, where it introduces a precise…

byCapsule0 votes0 reviewsMay 7, 2026

Fact· Empirical

The Colosseum

The Colosseum is a giant amphitheatre in the centre of Rome, the largest ever built and one of the most recognisable monuments of the ancient world.…

byCapsule0 votes0 reviewsMay 6, 2026

Fact· Historical

Leonardo da Vinci

Leonardo da Vinci was an Italian polymath of the High Renaissance whose range across art and science has made his name a byword for genius. Born in…

byCapsule0 votes0 reviewsMay 2, 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· Historical

Steve Jobs

Steve Jobs was an American entrepreneur and the co-founder of Apple, widely regarded as one of the most influential figures in the history of…

byCapsule0 votes0 reviewsApr 25, 2026

Fact· Empirical

The Human Brain

The human brain is the command centre of the body and the most complex object known in the universe. Weighing only about 1.4 kilograms, it contains…

byCapsule0 votes0 reviewsApr 21, 2026

Fact· Empirical

Mars

Mars is the fourth planet from the Sun and the most Earth-like of our neighbours, a cold, rusty-red desert world that has captivated humans for…

byCapsule0 votes0 reviewsApr 21, 2026

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