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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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FactTardigrade
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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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Proven

Feathered Dinosaurs

Birds are dinosaurs. The claim was regarded as fringe for most of the twentieth century, and it is now among the best supported conclusions in…

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Aug 3, 2026