# gor.bio

> A text-only open wiki of anything for anyone: searchable, freely reusable
> articles across science, technology, mathematics, computer science, history,
> and more. All text is freely reusable without attribution or backlink,
> including for automated processing and model training.

## Core pages
- [https://gor.bio/](https://gor.bio/): Home — searchable index of all articles
- [https://gor.bio/about](https://gor.bio/about): About this wiki
- [https://gor.bio/categories](https://gor.bio/categories): All categories
- [https://gor.bio/tags](https://gor.bio/tags): All tags
- [https://gor.bio/for-ai-agents](https://gor.bio/for-ai-agents): Documentation for crawlers, LLM agents, and automated software
- [https://gor.bio/legal/content-reuse](https://gor.bio/legal/content-reuse): Content reuse policy
- [https://gor.bio/rss.xml](https://gor.bio/rss.xml): RSS feed of recent and updated articles
- [https://gor.bio/sitemap.xml](https://gor.bio/sitemap.xml): Complete XML sitemap of all indexable URLs
- [https://gor.bio/toolkit](https://gor.bio/toolkit): The author's Builder's Knowledge System Kit — templates for documentation, decision records, research notes, and retrieval ($19)
- [https://gor.bio/remain-valuable](https://gor.bio/remain-valuable): The author's e-book How to Remain Valuable When Intelligence Becomes Cheap — 224 pages, full contents
- [https://gor.bio/wiki.json](https://gor.bio/wiki.json): Machine-readable metadata index of every article (JSON dataset)
- [https://gor.bio/categories.csv](https://gor.bio/categories.csv): Category taxonomy as CSV (slug, name, parent, article count, description, URL)

## Special content
- Article series linked to the author's e-books: https://gor.bio/tags/bookshop
- New e-book by the site author: How to Remain Valuable When Intelligence Becomes Cheap — a 224-page practical book on the scarce advantages that stay valuable when AI can do most cognitive work: https://theknowledgeproject.gumroad.com/l/remainvaluable

## Categories
- [https://gor.bio/categories/anthropology](https://gor.bio/categories/anthropology): The comparative study of human biology, culture, and society.
- [https://gor.bio/categories/archaeology](https://gor.bio/categories/archaeology): The study of past human societies through their material remains.
- [https://gor.bio/categories/artificial-intelligence](https://gor.bio/categories/artificial-intelligence): Machine learning, neural networks, and systems that perform tasks associated with intelligence.
- [https://gor.bio/categories/astronomy](https://gor.bio/categories/astronomy): The study of celestial objects, the structure of the universe, and the physics of space beyond Earth.
- [https://gor.bio/categories/behavioral-economics](https://gor.bio/categories/behavioral-economics): How psychological factors shape economic decisions.
- [https://gor.bio/categories/biology](https://gor.bio/categories/biology): The science of living organisms and the processes of life.
- [https://gor.bio/categories/chemistry](https://gor.bio/categories/chemistry): The composition, structure, and transformations of matter.
- [https://gor.bio/categories/civil-engineering](https://gor.bio/categories/civil-engineering): Design and construction of structures, transportation, and infrastructure.
- [https://gor.bio/categories/cognitive-psychology](https://gor.bio/categories/cognitive-psychology): Mental processes: perception, attention, memory, and reasoning.
- [https://gor.bio/categories/computer-science](https://gor.bio/categories/computer-science): Algorithms, data structures, complexity, and the theoretical foundations of computing.
- [https://gor.bio/categories/computer-vision](https://gor.bio/categories/computer-vision): Computational methods for interpreting images and video.
- [https://gor.bio/categories/contract-law](https://gor.bio/categories/contract-law): The legal rules governing enforceable agreements between parties.
- [https://gor.bio/categories/cryptography](https://gor.bio/categories/cryptography): Mathematical techniques for secure communication and data protection.
- [https://gor.bio/categories/cultural-anthropology](https://gor.bio/categories/cultural-anthropology): The study of human culture: kinship, ritual, economy, and social organization.
- [https://gor.bio/categories/developmental-psychology](https://gor.bio/categories/developmental-psychology): How people change across the lifespan: physical, cognitive, and social development.
- [https://gor.bio/categories/earth-science](https://gor.bio/categories/earth-science): The structure and processes of planet Earth.
- [https://gor.bio/categories/ecology](https://gor.bio/categories/ecology): The interactions of organisms with each other and their environment.
- [https://gor.bio/categories/economics](https://gor.bio/categories/economics): How individuals, firms, and societies allocate scarce resources and coordinate exchange.
- [https://gor.bio/categories/electrical-engineering](https://gor.bio/categories/electrical-engineering): Circuits, power systems, electronics, and electromagnetism.
- [https://gor.bio/categories/electromagnetism](https://gor.bio/categories/electromagnetism): The unified physics of electric and magnetic fields.
- [https://gor.bio/categories/engineering](https://gor.bio/categories/engineering): The application of science and mathematics to design structures, machines, and systems.
- [https://gor.bio/categories/epistemology](https://gor.bio/categories/epistemology): The philosophy of knowledge: its nature, sources, and limits.
- [https://gor.bio/categories/ethics](https://gor.bio/categories/ethics): Moral philosophy: theories of right action and the good life.
- [https://gor.bio/categories/genetics](https://gor.bio/categories/genetics): Heredity: genes, their transmission, and their variation.
- [https://gor.bio/categories/geology](https://gor.bio/categories/geology): The study of Earth's solid material: rocks, minerals, and the processes that shape them.
- [https://gor.bio/categories/geometry](https://gor.bio/categories/geometry): The study of space, shape, and the relations of figures.
- [https://gor.bio/categories/history](https://gor.bio/categories/history): Evidence-based accounts of past events and their contexts.
- [https://gor.bio/categories/immunology](https://gor.bio/categories/immunology): The study of the immune system and its defenses.
- [https://gor.bio/categories/law](https://gor.bio/categories/law): The rules and institutions by which societies order conduct and resolve disputes.
- [https://gor.bio/categories/linguistics](https://gor.bio/categories/linguistics): The scientific study of language: sounds, structure, meaning, and use.
- [https://gor.bio/categories/literary-analysis](https://gor.bio/categories/literary-analysis): How literary texts produce meaning: devices, structure, and interpretation.
- [https://gor.bio/categories/literature](https://gor.bio/categories/literature): Written and oral texts: fiction, poetry, drama, and the study of how they work.
- [https://gor.bio/categories/logic](https://gor.bio/categories/logic): The study of valid inference and formal systems of reasoning.
- [https://gor.bio/categories/machine-learning](https://gor.bio/categories/machine-learning): Algorithms that improve from data rather than from explicit instructions.
- [https://gor.bio/categories/macroeconomics](https://gor.bio/categories/macroeconomics): Economy-wide aggregates: growth, inflation, employment, and policy.
- [https://gor.bio/categories/mathematics](https://gor.bio/categories/mathematics): Theorems, structures, and methods across pure and applied mathematics.
- [https://gor.bio/categories/mechanical-engineering](https://gor.bio/categories/mechanical-engineering): Machines, materials, and the mechanics of solid bodies.
- [https://gor.bio/categories/medicine](https://gor.bio/categories/medicine): Human health and disease: the structure and function of the body, diagnosis, and treatment.
- [https://gor.bio/categories/meteorology](https://gor.bio/categories/meteorology): The study of the atmosphere and the weather it produces.
- [https://gor.bio/categories/microeconomics](https://gor.bio/categories/microeconomics): The behavior of individual markets, consumers, and firms.
- [https://gor.bio/categories/music](https://gor.bio/categories/music): Organized sound: theory, practice, and history of musical traditions.
- [https://gor.bio/categories/music-history](https://gor.bio/categories/music-history): The development of musical styles, practices, and institutions.
- [https://gor.bio/categories/music-theory](https://gor.bio/categories/music-theory): The structure of music: pitch, harmony, rhythm, and form.
- [https://gor.bio/categories/natural-language-processing](https://gor.bio/categories/natural-language-processing): Computational methods for understanding and generating human language.
- [https://gor.bio/categories/networking](https://gor.bio/categories/networking): Protocols, addressing, and the infrastructure that lets computers communicate.
- [https://gor.bio/categories/neural-networks](https://gor.bio/categories/neural-networks): Computational models of learning inspired by the structure of nervous systems.
- [https://gor.bio/categories/neuroscience](https://gor.bio/categories/neuroscience): The scientific study of the nervous system.
- [https://gor.bio/categories/number-theory](https://gor.bio/categories/number-theory): The study of the integers and their properties.
- [https://gor.bio/categories/oceanography](https://gor.bio/categories/oceanography): The oceans: currents, waves, chemistry, and their role in the climate system.
- [https://gor.bio/categories/organic-chemistry](https://gor.bio/categories/organic-chemistry): The chemistry of carbon compounds and their reactions.
- [https://gor.bio/categories/paleontology](https://gor.bio/categories/paleontology): The study of ancient life through fossils and the fossil record.
- [https://gor.bio/categories/pharmacology](https://gor.bio/categories/pharmacology): How drugs act on the body and how the body processes them.
- [https://gor.bio/categories/philosophy](https://gor.bio/categories/philosophy): Systematic inquiry into knowledge, reality, reason, and value.
- [https://gor.bio/categories/phonetics-and-phonology](https://gor.bio/categories/phonetics-and-phonology): Speech sounds: their production, acoustics, and systematic patterning.
- [https://gor.bio/categories/physics](https://gor.bio/categories/physics): The study of matter, energy, space, and time.
- [https://gor.bio/categories/physiology](https://gor.bio/categories/physiology): How the organs and systems of the body function.
- [https://gor.bio/categories/planetary-science](https://gor.bio/categories/planetary-science): Planets, moons, and small bodies of the solar system and beyond.
- [https://gor.bio/categories/poetry](https://gor.bio/categories/poetry): Verse: its forms, techniques, and traditions.
- [https://gor.bio/categories/probability-theory](https://gor.bio/categories/probability-theory): The mathematics of uncertainty and random phenomena.
- [https://gor.bio/categories/programming](https://gor.bio/categories/programming): Practical software development: languages, tools, databases, and engineering practice.
- [https://gor.bio/categories/psychology](https://gor.bio/categories/psychology): The scientific study of mind and behavior.
- [https://gor.bio/categories/quantum-mechanics](https://gor.bio/categories/quantum-mechanics): The physics of the very small: quanta, waves, and measurement.
- [https://gor.bio/categories/semantics](https://gor.bio/categories/semantics): The study of meaning in language.
- [https://gor.bio/categories/social-psychology](https://gor.bio/categories/social-psychology): How people think about, influence, and relate to one another.
- [https://gor.bio/categories/statistics](https://gor.bio/categories/statistics): The science of collecting, summarizing, and drawing conclusions from data.
- [https://gor.bio/categories/stellar-astronomy](https://gor.bio/categories/stellar-astronomy): Stars: their formation, structure, evolution, and endpoints.
- [https://gor.bio/categories/syntax](https://gor.bio/categories/syntax): The rules and structures by which words combine into sentences.
- [https://gor.bio/categories/web-development](https://gor.bio/categories/web-development): Building software delivered over the web: HTTP, APIs, and frontend practice.

## Latest articles
- [https://gor.bio/wiki/placebo-effect](https://gor.bio/wiki/placebo-effect): The placebo effect is a real improvement caused by expectation, not an active treatment. Learn how it works in the brain, where it helps, and what it cannot do.
- [https://gor.bio/wiki/how-lasers-work](https://gor.bio/wiki/how-lasers-work): A laser amplifies light through stimulated emission to make a narrow, coherent beam of one colour. Learn population inversion, the parts of a laser, and its uses.
- [https://gor.bio/wiki/harmonic-series-and-overtones](https://gor.bio/wiki/harmonic-series-and-overtones): Every musical note contains a stack of overtones at whole-number multiples of its frequency. Learn the harmonic series and how it shapes timbre and intervals.
- [https://gor.bio/wiki/how-the-heart-works](https://gor.bio/wiki/how-the-heart-works): The heart is a four-chambered muscular pump. Learn how blood flows through its chambers and valves, how it keeps its rhythm, and what a heartbeat actually is.
- [https://gor.bio/wiki/fibonacci-sequence-and-golden-ratio](https://gor.bio/wiki/fibonacci-sequence-and-golden-ratio): Each Fibonacci number is the sum of the previous two, and their ratio approaches the golden ratio, about 1.618. See the math, the history, and the myths.
- [https://gor.bio/wiki/indo-european-languages](https://gor.bio/wiki/indo-european-languages): Indo-European languages, from English to Hindi, descend from one ancestor spoken thousands of years ago. See the branches, the evidence, and the homeland debate.
- [https://gor.bio/wiki/stoicism](https://gor.bio/wiki/stoicism): Stoicism teaches that virtue is the only true good and that we should focus on what we can control. Learn its origins, key ideas, and practical exercises.
- [https://gor.bio/wiki/the-trolley-problem](https://gor.bio/wiki/the-trolley-problem): The trolley problem asks whether to divert a runaway trolley to kill one person instead of five. Explore its variants, the ethical theories, and AI applications.
- [https://gor.bio/wiki/the-rosetta-stone](https://gor.bio/wiki/the-rosetta-stone): The Rosetta Stone carries one decree in three scripts. Found in 1799, it let Jean-François Champollion decipher Egyptian hieroglyphs in 1822. Here is the story.
- [https://gor.bio/wiki/the-black-death](https://gor.bio/wiki/the-black-death): The Black Death killed an estimated third to half of Europe between 1347 and 1351. Learn its cause, how it spread, and how it reshaped society and medicine.
- [https://gor.bio/wiki/solar-eclipses](https://gor.bio/wiki/solar-eclipses): A solar eclipse happens when the Moon passes between Earth and the Sun. Learn the types, why totality is rare, the Saros cycle, and how to watch one safely.
- [https://gor.bio/wiki/how-hurricanes-form](https://gor.bio/wiki/how-hurricanes-form): Hurricanes form over warm ocean water when heat, moisture, and rotation organize a storm. Learn the ingredients, the Saffir-Simpson scale, and why storm surge kills.
- [https://gor.bio/wiki/octopus-intelligence](https://gor.bio/wiki/octopus-intelligence): Octopuses have about 500 million neurons, most of them in their arms, and solve puzzles, use tools, and escape tanks. Explore how their alien intelligence works.
- [https://gor.bio/wiki/how-caffeine-works](https://gor.bio/wiki/how-caffeine-works): Caffeine does not give energy; it blocks adenosine receptors so you feel less tired. Learn its half-life, safe daily limits, tolerance, and effects on sleep.
- [https://gor.bio/wiki/mitosis-and-meiosis](https://gor.bio/wiki/mitosis-and-meiosis): Mitosis makes two identical cells for growth and repair; meiosis makes four genetically different sex cells. Compare their stages, results, and why both matter.
- [https://gor.bio/wiki/normal-distribution](https://gor.bio/wiki/normal-distribution): The normal distribution, or bell curve, is symmetric around its mean. Learn the 68-95-99.7 rule, z-scores, why it appears so often, and where it fails.
- [https://gor.bio/wiki/monty-hall-problem](https://gor.bio/wiki/monty-hall-problem): In the Monty Hall problem, switching doors wins the car two-thirds of the time. See the counterintuitive probability explained step by step, with its assumptions.
- [https://gor.bio/wiki/prime-numbers-and-the-sieve-of-eratosthenes](https://gor.bio/wiki/prime-numbers-and-the-sieve-of-eratosthenes): A prime has exactly two divisors, 1 and itself. Learn why primes never run out, how the ancient Sieve of Eratosthenes finds them, and why they secure the internet.
- [https://gor.bio/wiki/retrieval-augmented-generation](https://gor.bio/wiki/retrieval-augmented-generation): RAG gives a language model relevant documents at question time by searching a knowledge base first. Learn how it works, why it helps, and where it fails.
- [https://gor.bio/wiki/how-tls-works](https://gor.bio/wiki/how-tls-works): TLS encrypts web traffic using a handshake that authenticates the server with a certificate and agrees on fresh keys. See how HTTPS keeps connections private.
- [https://gor.bio/wiki/tcp-vs-udp](https://gor.bio/wiki/tcp-vs-udp): TCP delivers data reliably and in order using handshakes and retransmission; UDP sends fast, connectionless datagrams. Compare the two and learn when each fits.
- [https://gor.bio/wiki/how-suspension-bridges-work](https://gor.bio/wiki/how-suspension-bridges-work): Suspension bridges hang the deck from main cables held up by towers and anchorages. See how tension carries the load, using the Golden Gate Bridge as the example.
- [https://gor.bio/wiki/how-airplanes-generate-lift](https://gor.bio/wiki/how-airplanes-generate-lift): Wings generate lift by deflecting air downward and creating lower pressure above the wing. Here is how angle of attack, speed, and wing shape make flight work.
- [https://gor.bio/wiki/gravitational-waves](https://gor.bio/wiki/gravitational-waves): Gravitational waves are ripples in spacetime from accelerating masses. LIGO first detected them in 2015 from two merging black holes 1.3 billion light-years away.
- [https://gor.bio/wiki/why-is-the-sky-blue](https://gor.bio/wiki/why-is-the-sky-blue): The sky is blue because air molecules scatter short-wavelength blue light far more than red light — Rayleigh scattering — and the same effect paints sunsets red.
- [https://gor.bio/wiki/compound-interest](https://gor.bio/wiki/compound-interest): Compound interest explained: how reinvested returns snowball over time, the rule of 72, and why compounding builds savings but deepens debt.
- [https://gor.bio/wiki/dunning-kruger-effect](https://gor.bio/wiki/dunning-kruger-effect): The Dunning-Kruger effect: why beginners overestimate their skill, what the original psychology studies found, and how to judge yourself fairly.
- [https://gor.bio/wiki/diabetes-and-insulin](https://gor.bio/wiki/diabetes-and-insulin): Diabetes and insulin explained: why blood sugar rises when insulin is missing or resisted, the main diabetes types, symptoms, diagnosis and control.
- [https://gor.bio/wiki/what-is-cancer](https://gor.bio/wiki/what-is-cancer): What is cancer? How gene mutations make cells divide uncontrollably, form tumors and spread — plus the main cancer types, causes and treatments.
- [https://gor.bio/wiki/el-nino-and-la-nina](https://gor.bio/wiki/el-nino-and-la-nina): El Nino and La Nina explained: how Pacific ocean warming and cooling shift rainfall, droughts, storms and fisheries in the ENSO climate cycle.

## Full inventory
- Complete inventory of all 267 articles, categories, and tags: https://gor.bio/sitemap.xml
- Article list with dates: https://gor.bio/rss.xml