Science Atlas

How We Know What We Know
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The sciences & how we know

Every discovery, one connected map of knowing.

Science Atlas is a cross-referenced encyclopedia of the sciences, from physics, chemistry, and biology to astronomy, geology, and beyond. Search any theory, instrument, or scientist and follow its threads through every discipline that builds on it.

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1,924Scientists65Disciplines252Theories6,788Entries
28,765Sourced facts

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Every section of the atlas.

What you can do here

Explore & connect

Open any entry and follow it outward through everything it touches: the people, the experiments, the instruments and the ideas it rests on. See what cites it in return.

Compare disciplines

Set two or more disciplines, theories or methods side by side and see where their evidence, their claims and their limits actually overlap.

Featured today

A cross section of the collection.

Units

Ampere

The ampere is the base unit of electric current in the International System of Units, named for the French physicist Andre-Marie Ampere. It is defined

Instruments

Sextant

A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects, most often a celestial body and

Scientists

Robert Jemison Van de Graaff

Robert Jemison Van de Graaff was an American physicist who invented the Van de Graaff generator in 1929, an electrostatic machine that builds up very

Institutions

Naval Research Laboratory

The United States Naval Research Laboratory, known as NRL, is the corporate research laboratory for the United States Navy and the United States Marin

Disciplines

Atomic Physics

Atomic physics is the branch of physics that studies atoms as isolated systems of electrons bound to a nucleus, examining their structure, energy leve

Theories

General Relativity

General relativity is Albert Einstein's theory of gravitation, which describes gravity as the curving of space and time by mass and energy. It replace

Experiments

Discovery of Oxygen

Oxygen was independently isolated by two chemists within a few years of each other, a genuine priority dispute rather than a single settled discovery.

Concepts

Confidence Interval

A confidence interval is a range of values, calculated from sample data, constructed by a procedure guaranteed to contain the true value of an unknown

An Open Question

A gap nobody has closed yet, rotated daily.

Historical linguistics, Sanskrit philology and Indology, numismatics

In which century did Panini, the Sanskrit grammarian, live?

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