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All Theories & Experiments

The claims science has tested and the tests themselves: a theory describes what is held to be true and why, an experiment is the test that supported or challenged it. Together they are the atlas's record of how a claim earned its standing.

Pauli Exclusion Principle

Pavlov's Classical Conditioning Experiments

Peano Axioms

Pearson's Chi-Squared Test

Phlogiston Theory

Photoelectric Effect

Photograph 51

Planck's Law

Plate Tectonics

Polar Front Theory

Prime Number Theorem

Principle of Cross-Cutting Relationships

Principle of Faunal Succession

Principle of Original Horizontality

Prion

Protein Sequencing

Punctuated Equilibrium

Pythagorean Theorem

Quantum Chromodynamics

Quantum Electrodynamics

Quantum Entanglement

Quantum Field Theory

Quantum Theory

Quark Model

Rainbow gravity theory

Ramsey Theory

Raoult's Law

Recapitulation Theory

Recent African Origin of Modern Humans

Reciprocal Altruism

Red Queen Hypothesis

Richardson's 1922 Numerical Forecast

RNA World Hypothesis

Roberts-Austen's Iron-Carbon Constitution Diagram

Rutherford Gold Foil Experiment

Saltation (biology)

Samoa Fieldwork

Schrodinger Equation

Scientific theory

Seafloor Spreading

Second Law of Thermodynamics

Set Theory

Sexual Selection

Snowball Earth

Somatic Mutation Theory of Cancer

Sorby's Microscopical Study of Steel

Special Relativity

Spemann-Mangold Organizer Experiment

Spontaneous Generation

Spontaneous Symmetry Breaking

Standard Model

Statistical Mechanics

Steady State Theory

Stefan-Boltzmann Law

Stellar Nucleosynthesis

Stored-Program Architecture

String Theory

Supersymmetry

Systems Ecology

Terrane

The Periodic Table

Theory of Everything

Thermohaline Circulation

Third Law of Thermodynamics

Three-Domain System

Transition State Theory

Trobriand Islands Fieldwork

Trophic Cascade

Trouton's rule

Turing Machine

Uncertainty Principle

Uniformitarianism

Universal Grammar

Universal Gravitation

Valence Bond Theory

Verificationism

Vine-Matthews-Morley Hypothesis

Vine-Matthews-Morley Magnetic Striping Study

Vitalism

Von Baer's laws (embryology)