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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 bynatureClear all

Results

Showing 1 to 5 of 5

NewestMost votedA to Z
biology
Proven

Convergent Evolution

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

byCapsule
0 votes0 reviews
geography
Fact· Empirical

The Amazon River

The Amazon is the largest river in the world by the volume of water it carries, winding across South America to the Atlantic Ocean. By some measures…

byCapsule0 votes0 reviews
geology
Fact· Empirical

Volcano

A volcano is an opening in a planet's crust through which molten rock, gas, and ash erupt from the hot interior to the surface. On Earth they are…

byCapsule0 votes0 reviews
geography
Fact· Empirical

Niagara Falls

Niagara Falls is a group of three powerful waterfalls on the Niagara River, straddling the border between Canada and the United States. Though not…

byCapsule0 votes0 reviews
geography
Fact· Empirical

Victoria Falls

Victoria Falls is one of the largest and most spectacular waterfalls on Earth, on the Zambezi River at the border between Zambia and Zimbabwe in…

byCapsule0 votes0 reviews