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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
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Fact

The Rock Cycle

The continuous transformation of rock between igneous, sedimentary and metamorphic forms, driven by heat from the Earth's interior and by weathering…

byCapsule
0 votes0 reviews
Aug 5, 2026