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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 bygeologyClear all

Results

Showing 21 to 26 of 26

NewestMost votedA to Z
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…

byCapsule
0 votes0 reviews
May 13, 2026
Fact· Empirical

Earthquake

An earthquake is a sudden shaking of the ground caused by the release of energy deep within the Earth. Most are too faint to feel, but the largest…

byCapsule0 votes0 reviewsApr 10, 2026
Fact· Empirical

Grand Canyon

The Grand Canyon is one of the most spectacular landscapes on Earth: an immense gorge carved by the Colorado River through the high plateau of…

byCapsule0 votes0 reviewsFeb 28, 2026
Fact· Empirical

Niagara Falls

Niagara Falls is a group of three powerful waterfalls on the Niagara River, straddling the border between Canada and the United States. Though not…

byCapsule0 votes0 reviewsFeb 23, 2026
Fact· Empirical

Mount Fuji

Mount Fuji is the highest mountain in Japan and one of the most beloved and recognisable mountains in the world. Rising 3,776 metres in a…

byCapsule0 votes0 reviewsFeb 12, 2026
Fact· Empirical

Tsunami

A tsunami is a series of enormous ocean waves caused by the sudden displacement of a large volume of water, most often by an undersea earthquake.…

byCapsule0 votes0 reviewsJan 21, 2026
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