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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 byhistoryClear all

Results

Showing 81 to 100 of 172

NewestMost votedA to Z
Theory

Equal Temperament

Every note on a modern piano is slightly out of tune, deliberately and by a known amount. Equal temperament divides the octave into twelve identical…

byCapsule
0 votes0 reviews
Aug 3, 2026
Contested

Democratic Peace Theory

Democratic peace theory holds that democracies do not, or almost never, go to war with one another. It is among the strongest empirical regularities…

byCapsule0 votes0 reviewsAug 3, 2026
Contested

The Protestant Ethic Thesis

In 1905 Max Weber argued that the Protestant Reformation, and Calvinism in particular, produced a cultural disposition toward disciplined work and…

byCapsule0 votes0 reviewsAug 3, 2026
Theory

Proto-Indo-European

Proto-Indo-European is a language nobody has ever heard, that left no written record, and whose vocabulary and grammar have nonetheless been…

byCapsule0 votes0 reviewsAug 3, 2026
Theory

Keynesian Economics

Keynesian economics is the body of theory, originating with John Maynard Keynes in the 1930s, holding that total spending in an economy drives output…

byCapsule0 votes0 reviewsAug 2, 2026
Fact· Historical

World War I

World War I (1914 to 1918), known at the time as the Great War, was one of the deadliest conflicts in history, killing around 20 million people and…

byCapsule0 votes0 reviewsJul 17, 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 Black Death

The Black Death was a devastating plague that swept through Europe, Asia, and North Africa in the mid 1300s, killing tens of millions of people. One…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

World War II

World War II (1939 to 1945) was the deadliest and most widespread conflict in human history, involving most of the world's nations and claiming an…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

The Titanic

The Titanic was a British ocean liner that sank in 1912 on its very first voyage after striking an iceberg, killing about 1,500 people. The disaster…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Winston Churchill

Winston Churchill (1874 to 1965) was a British statesman who served as Prime Minister during the Second World War and led the United Kingdom through…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Barack Obama

Barack Obama (born 1961) is an American politician who served as the 44th President of the United States, from 2009 to 2017. The first Black…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Diana, Princess of Wales

Diana, Princess of Wales (1961 to 1997) was a member of the British royal family who became one of the most famous and beloved women in the world.…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Amelia Earhart

Amelia Earhart (1897 to disappeared 1937) was an American aviation pioneer and the first woman to fly solo across the Atlantic Ocean. A daring record…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Malcolm X

Malcolm X (1925 to 1965) was an American Muslim minister and human rights activist, one of the most influential and controversial figures of the…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Mother Teresa

Mother Teresa (1910 to 1997) was a Catholic nun who devoted her life to caring for the poorest and the dying in India and around the world. Honoured…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Mansa Musa

Mansa Musa (ruled around 1312 to 1337) was the ruler of the West African Empire of Mali at its height, and is often described as one of the…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Rosa Parks

Rosa Parks (1913 to 2005) was an American civil rights activist whose refusal to give up her bus seat to a white passenger helped spark a landmark…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Confucius

Confucius (551 to 479 BC) was a Chinese philosopher and teacher whose ideas about ethics, family, and good government shaped Chinese civilization for…

byCapsule0 votes0 reviewsJun 12, 2026
Fact· Historical

Napoleon Bonaparte

Napoleon Bonaparte (1769 to 1821) was a French military and political leader who rose during the French Revolution to become Emperor of the French…

byCapsule0 votes0 reviewsJun 12, 2026
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