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Capsule of the Day

FactSurgeryTreatment by physical intervention in the body. Surgery was limited for millennia not by knowledge of anatomy but by th…

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The library

Capsules

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

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered byFacthealthClear all

Results

Showing 1 to 8 of 8

NewestMost votedA to Z
Fact

Nursing

The care of the sick, injured and dependent. Nursing is the largest health profession by a wide margin, its outcomes are measurable and substantial,…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

Surgery

Treatment by physical intervention in the body. Surgery was limited for millennia not by knowledge of anatomy but by three specific obstacles, and…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Allergy

An immune response to a harmless substance. The machinery involved evolved to deal with parasites, the response causes the disease rather than the…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Urban Parks

Public open green space within a city, maintained for recreation and amenity. They were created deliberately as a response to industrial urban…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Dietary Fibre

The parts of plant food that human digestive enzymes cannot break down. It supplies no energy directly and is one of the more consistently supported…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Bacteria

Single-celled organisms without a nucleus, present in essentially every environment on Earth, and vastly outnumbering all other forms of life. A…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Vitamins

Organic compounds required in small amounts that the body cannot make for itself, or cannot make in sufficient quantity. Each was discovered through…

byCapsule0 votes0 reviewsAug 5, 2026
Fact· Empirical

Vaccines

A vaccine is a preparation that trains the immune system to recognize and fight a specific disease before the body is ever exposed to the real…

byCapsule0 votes0 reviewsMar 6, 2026