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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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  • FactTardigrade
  • FactMonarch Butterfly
  • FactSpider

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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byProvenbiologyevolutionClear all

Results

Showing 1 to 2 of 2

NewestMost votedA to Z
biology
Proven

Sexual Selection

Darwin's second theory, proposed to explain traits that natural selection could not: peacock tails, antlers, birdsong, and every ornament that costs…

byCapsule
0 votes0 reviews
biology
Proven

Convergent Evolution

Unrelated lineages repeatedly arrive at the same solution. Eyes, wings, flight, venom and photosynthesis have each evolved independently many times,…

byCapsule0 votes0 reviews