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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
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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byProvenevolutionClear all

Results

Showing 1 to 7 of 7

NewestMost votedA to Z
immunology
Proven

Clonal Selection

The immune system generates enormous numbers of cells with randomly assembled receptors, and whichever happen to fit an invader are multiplied. It is…

byCapsule
0 votes0 reviews
genetics
Proven

The Hardy-Weinberg Principle

In a large population with random mating and nothing else happening, gene frequencies do not change from one generation to the next. It sounds like a…

byCapsule0 votes0 reviews
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…

byCapsule0 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
paleontology
Proven

Transitional Fossils

A transitional fossil shows a mixture of features from an ancestral group and a descendant one. Their absence was Darwin's own stated difficulty with…

byCapsule0 votes0 reviews
paleontology
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…

byCapsule0 votes0 reviews
medicine
Proven· Replicated

Antibiotic Resistance

Antibiotic resistance is the ability of bacteria to survive the drugs designed to kill them. It is one of the most direct and observable examples of…

byCapsule0 votes0 reviews