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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 bygravityClear all

Results

Showing 1 to 5 of 5

NewestMost votedA to Z
astrophysics
Fact

Neutron Stars

The collapsed cores left by massive stars, containing more than the Sun's mass within a sphere about twenty kilometres across. They are the densest…

byCapsule
0 votes0 reviews
astronomy
Debunked

The Planet Vulcan

A planet proposed to orbit between Mercury and the Sun, invoked to explain an anomaly in Mercury's orbit, searched for over half a century, and shown…

byCapsule0 votes0 reviews
earth science
Proven

Tides

The periodic rise and fall of sea level caused by the gravitational pull of the Moon and Sun acting unequally across the Earth. The cause has been…

byCapsule0 votes0 reviews
physics
Hypothesis

Loop Quantum Gravity

An attempt to make gravity quantum by quantising spacetime itself, producing a picture in which space is granular and area and volume come in…

byCapsule0 votes0 reviews
astronomy
Fact· Empirical

Black Hole

A black hole is a region of space where gravity is so intense that nothing, not even light, can escape once it passes a certain boundary. They are…

byCapsule0 votes0 reviews