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FactSurgeryTreatment by physical intervention in the body. Surgery was limited for millennia not by knowledge of anatomy but by th…

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The library

Capsules

1,028 capsules, each one classified by the strength of its evidence.

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byFactpaleontologyClear all

Results

Showing 1 to 3 of 3

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paleontology
Fact

Mass Extinctions

Intervals in which a large proportion of species disappeared worldwide in a geologically short time. Five are conventionally recognised in the past…

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paleontology
Fact

Trilobites

An extinct class of marine arthropods that existed for roughly 270 million years, left an exceptionally rich fossil record, and are among the most…

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paleontology
Fact

Fossils

The preserved remains or traces of past life. They are the direct evidence for the history of life on Earth, and the record they form is…

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