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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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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byHypothesisclimateClear all

Results

Showing 1 to 5 of 5

NewestMost votedA to Z
anthropology
Hypothesis

The Savanna Hypothesis

The proposal that human ancestors left the forest for open grassland, and that walking upright, losing body hair and much else followed from that…

byCapsule
0 votes0 reviews
earth science
Hypothesis

The Faint Young Sun Paradox

The Sun was about thirty percent dimmer when the Earth was young, which should have left the planet frozen solid. The geological record shows liquid…

byCapsule0 votes0 reviews
geology
Hypothesis

The Toba Catastrophe Hypothesis

The proposal that a supervolcanic eruption in Sumatra about 74,000 years ago caused a volcanic winter that nearly exterminated the human species,…

byCapsule0 votes0 reviews
geology
Hypothesis

The Silurian Hypothesis

If an industrial civilisation had existed on Earth millions of years before our own, would we be able to tell? Gavin Schmidt and Adam Frank asked the…

byCapsule0 votes0 reviews
geology
Hypothesis

The Younger Dryas Impact Hypothesis

The proposal that a comet or asteroid struck or exploded over North America about 12,800 years ago, triggering an abrupt return to glacial…

byCapsule0 votes0 reviews