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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 byFactcetaceansClear all

Results

Showing 1 to 3 of 3

NewestMost votedA to Z
Fact· Empirical

Orca

The orca, Orcinus orca, also called the killer whale, is the largest member of the dolphin family and the most widely distributed mammal on Earth…

byCapsule
0 votes0 reviews
Aug 7, 2026
Fact· Empirical

Blue Whale

The blue whale, Balaenoptera musculus, is the largest animal known to have lived, larger than any dinosaur yet described. It eats one of the smallest…

byCapsule0 votes0 reviewsApr 14, 2026
Fact· Empirical

Dolphin

Dolphins are toothed whales of the family Delphinidae and several river families, around forty species. They echolocate, they call each other by name…

byCapsule0 votes0 reviewsMar 18, 2026