Science & Knowledge

Bitsavers

Legendary archive preserving computer manuals, documentation, and software from the early days of computing. An essential resource for computer history.

Mark's Blog

Mark Litwintschik on big data, geospatial, and ML infrastructure. Benchmarks and tutorials.

Of Dollars And Data

Nick Maggiulli on data-driven personal finance. Evidence-based money decisions.

Experimental History

Adam Mastroianni on psychology research, academia, and human behavior. Former academic gone rogue.

brr.fyi

Antarctic research station blog. What it's really like to work at the South Pole.

DataTau

Hacker News for data science. Links about machine learning, statistics, data engineering.

WXCharts

Weather model charts. GFS, ECMWF, and ensemble forecasts.

Tropical Tidbits

Tropical weather analysis. Hurricane tracking and model data.

Lightning Maps

Real-time lightning strikes worldwide. Community-detected data.

Weather Underground

Community weather stations. Hyperlocal forecasts from citizen scientists.

Find a Grave

Cemetery records database. Millions of burial records with photos.

FamilySearch

Free genealogy research. Billions of records from LDS archives.

GOSH

Gathering for Open Science Hardware. Open tools for research.

The Sky Live

Real-time sky events. Planet positions, conjunctions, and eclipses.

Natural Earth

Free public domain map data. Vector and raster for cartographers.

David Rumsey Map Collection

Historical map collection. Over 100,000 high-resolution scans.

Global Footprint Network

Ecological footprint data. Track humanity's demand on nature.

IPCC Atlas

Interactive climate change atlas. Visualize projections by region.

Climate Watch

Climate data platform. Emissions, commitments, and indicators visualized.

Low-Tech Magazine

Sustainable solutions through historical technology. Challenging progress narratives.

Resilience

Building a world of resilient communities. Energy, economy, environment.

Khymos

Molecular gastronomy and food science. Technical cooking exploration.

Endangered Languages Project

Documenting and preserving endangered languages. Interactive map and resources.

Omniglot

Encyclopedia of writing systems and languages. Scripts, alphabets, and constructed languages.

MathOverflow

Q&A for professional mathematicians. Research-level discussions.

Nautilus

Nautilus is an actively maintained, independent science publication (last updated October 2025). It publishes high-quality, long-form journalism exploring scientific topics and their cultural implications. Founded as a non-corporate platform for science storytelling, it features academic and cultural commentary rather than marketing content. The site exemplifies the indie web ethos - thoughtfully curated content, multiple editorial channels (Art+Science, Biology+Beyond, Ocean, Mind, Culture, etc

OpenRailwayMap

Worldwide railway infrastructure map. Track layouts, signals, and stations.

RailPictures.net

Railroad photography database. Quality photos sorted by railroad and location.

Factsheet Five Archive

Archive of the legendary zine review magazine. Thousands of zine reviews from the 80s-90s.

Zine Libraries

Directory of zine libraries worldwide. Physical collections preserving DIY publishing.

Film Dev

Community film development database. Recipes and times for any film/developer combo.

Wild Sanctuary

Bernie Krause's bioacoustics archive. Natural soundscapes and environmental audio.

Soundsnap

Sound effects and field recording library. Professional quality audio.

Radio Aporee Maps

Global sound map. Field recordings pinned to locations worldwide.

45cat

7-inch single database. Catalog and track 45 RPM releases.

The Cutting Room Floor

Unused and cut video game content. Debug modes, regional differences, and hidden secrets.

SMS Power

Sega Master System and Game Gear preservation. Scans, translations, and homebrew.

Romhacking.net

ROM hacking community. Translations, hacks, and utilities for retro games.

IF Archive

Repository of interactive fiction. Games, interpreters, and development tools.

IFDB

Interactive Fiction Database. Reviews and downloads for text adventures and parser games.

TASVideos

Tool-assisted speedrun archive. Frame-perfect runs pushing games to theoretical limits.

Speedrun.com

The speedrunning leaderboard. Records, rules, and community for thousands of games.

Noma Fermentation

Restaurant Noma's fermentation lab. Innovations in koji, garum, and vinegar.

Coffee ad Astra

Jonathan Gagne's coffee science. Data-driven brewing research and experiments.

Peakbagger

Peak database and climbing lists. Track summits and explore mountain statistics.

UK Cave Registry

British caving database. Cave locations, surveys, and exploration records.

The Virtual Cave

Educational cave photography and geology. Speleothem formations explained with images.

Infiltration

Classic urbex zine archive. Ninjalicious' writings on exploring hidden infrastructure.

Fungi Perfecti

Paul Stamets' mycology resource. Mushroom cultivation, research, and medicinal uses.

iNaturalist

Biodiversity observation network. AI-assisted species identification and citizen science.

MushroomExpert.com

Michael Kuo's mushroom identification resource. Detailed species pages with microscopy and keys.

British Trust for Ornithology

UK bird research and citizen science. Surveys, ringing data, and population monitoring.

Xeno-canto

Worldwide bird sound archive. Community-contributed recordings of over 10,000 species.

All About Birds

Cornell Lab's bird guide. Species accounts, sounds, and identification tips for North American birds.

eBird

Cornell Lab's bird observation database. Log sightings, explore hotspots, and contribute to science.

The Wood Database

Encyclopedic wood species reference. Properties, workability, and identification for hundreds of species.

Knife Steel Nerds

Dr. Larrin Thomas on knife metallurgy. Scientific analysis of steels, heat treatment, and edge retention.

N0NBH Solar Resources

Real-time solar and propagation data for hams. HF conditions, solar flux, and band condition widgets.

aprs.fi

Real-time APRS tracking map. See amateur radio position reports, weather stations, and objects worldwide.

Signal Identification Wiki

Database of radio signals. Identify unknown transmissions by their sound and waterfall pattern.

PSK Reporter

Real-time map of digital mode amateur radio signals. Watch FT8, WSPR, and other modes propagate globally.

scene.org Demo Archive

Direct access to the scene.org demo file archive. Browse by year, party, or platform.

CSDb

Commodore 64 Scene Database. Complete archive of C64 demos, cracks, and releases.

Amiga Music Preservation

Archive of Amiga demoscene music. Tracker modules, musician profiles, and music disk collections.

The Mod Archive

Massive collection of tracker music modules. MOD, XM, S3M, IT files from the demoscene and beyond.

scene.org

The demoscene's primary file archive. Decades of demos, intros, music, and graphics freely downloadable.

Anna's Archive

The world's largest open library. Search engine for shadow libraries, providing access to books, papers, and comics.

textfiles.com

Jason Scott's archive of BBS-era text files. Thousands of documents from the pre-web internet preserved for posterity.

The Intercept

Adversarial journalism. Investigative reporting on national security, politics, and civil liberties.

Bellingcat

Open source intelligence and investigative journalism. Pioneering OSINT techniques to uncover truth.

The Markup

Data-driven investigative journalism on technology. Exposing how algorithms affect our lives.

Reveal

Investigative journalism from The Center for Investigative Reporting. Deep dives into systemic issues.

NASA Climate

NASA's portal for climate science. Vital signs of the planet, evidence, and visualizations.

Carbon Brief

Clear on climate. Science-based analysis of climate change and energy policy.

16colors

Archive of ANSI and ASCII art from the BBS scene. Thousands of artpacks preserved from the 80s and 90s.

Defacto2

Archive of the PC cracking and warez scene. NFO files, cracktros, and digital artifacts from underground computing.

Complexity Explorables

Interactive explorations of complex systems. Emergence, chaos, networks - play with the math.

Awesome Data Science

Curated list of data science resources. Learning paths, tools, and datasets.

Awesome Machine Learning

Curated list of ML frameworks, libraries, and resources across multiple languages.

Global Forest Watch

Real-time monitoring of forests worldwide. Track deforestation and forest fires globally.

Electricity Maps

Real-time visualization of electricity consumption and carbon intensity worldwide.

Project Drawdown

World's leading resource for climate solutions. 100 solutions to reverse global warming.

CourtListener

Free legal research from Free Law Project. Search millions of court opinions and oral arguments.

GovTrack

Track the U.S. Congress. Bills, votes, and congressional activity made accessible.

Open States

Track state legislation across all 50 U.S. states. Open data on state politics.

OpenSecrets

Follow the money in politics. Campaign finance and lobbying data made accessible.

The Criterion Collection

Curated classic and contemporary cinema. The gold standard for film preservation and curation.

IMDb

The Internet Movie Database. Comprehensive information on films, TV, and cast.

archive.today

Webpage archiving service. Save snapshots of pages before they change or disappear.

Khan Academy

Free education for anyone, anywhere. Math, science, computing, and more with personalized learning.

Brilliant

Interactive courses in math, science, and CS. Learn by solving problems, not watching videos.

MIT OpenCourseWare

Free MIT course materials. Lectures, notes, and assignments from real MIT classes.

Astronomy Picture of the Day

NASA's daily astronomy image with expert explanation. Running since 1995, a treasure trove of space imagery.

Stellarium Web

Free online planetarium. View the night sky from anywhere on Earth at any time. Beautiful and educational.

Heavens-Above

Track satellites, ISS passes, and celestial events. Precise predictions for your location.

MusicBrainz

Open music encyclopedia. Community-maintained database of music metadata used by many apps.

ShadeMap

3D shade map of the entire world. See shadows from mountains, buildings, and trees for any date and time.

Inside the Great Pyramid

3D scan of the interior of the Great Pyramid at Giza. Explore ancient architecture from your browser.

Hacker Recommended Books

Books extracted from 40k Hacker News comments using deep learning. Discover what HN readers actually recommend.

ProjectionLab

Personal finance simulator. Model different scenarios for retirement, investments, and life decisions.

Tatoeba

Collection of sentences and translations. User-contributed parallel corpus for language learning.

Cut The Knot

Interactive mathematics miscellany. Hundreds of puzzles, proofs, and explorations.

Quanta Magazine

Science and math journalism. Accessible coverage of cutting-edge research.

Internet Archive Audio

Free audio archive. Live concerts, old radio, audiobooks, and podcasts.

NASA's Eyes

3D visualization of our solar system, Earth, and NASA missions. Explore space from your browser.

Observable

Collaborative data visualization platform. JavaScript notebooks for exploring and sharing data insights.

Earth Wind Map

Real-time visualization of global weather conditions. Hypnotic animation of wind, temperature, and more.

Windy

Beautiful weather forecasting. Detailed models, radar, and satellite imagery in an elegant interface.

Investopedia

Financial education and market data. Learn investing concepts and track markets.

Internet Archive Software Library

Thousands of old programs, games, and operating systems playable in your browser. Computing history preserved.

Oldskool.org

Jim Leonard's retro computing resource. PC demos, vintage hardware documentation, and digital preservation.

FlowingData

Nathan Yau's data visualization blog. Tutorials, inspiration, and commentary on visualizing information.

Information is Beautiful

Award-winning data visualization. Complex information made accessible through beautiful graphics.

Library of Congress Collections

Digital collections from the world's largest library. Photos, maps, recordings, and documents from American history.

Europeana

Digital heritage from European museums, libraries, and archives. Millions of cultural artifacts online.

Google Arts & Culture

Explore art and history from institutions worldwide. Virtual museum tours and high-resolution artwork.

Acme Klein Bottles

Cliff Stoll's Klein bottle business. Hand-blown mathematical glass objects and astronomer wisdom.

Citizen Lab

Research lab studying digital threats to civil society. Exposes government surveillance and spyware.

Portfolio Visualizer

Backtest and analyze investment portfolios. Monte Carlo simulation and factor analysis.

Examine

Unbiased nutrition and supplement information. Evidence-based health research.

SpaceWeather

Solar activity and space weather. Aurora forecasts, meteor showers, and sun news.

In-The-Sky

Interactive planetarium and astronomy calendar. See what's visible tonight.

The Physics Classroom

Physics tutorials and interactives. Clear explanations of physics concepts.

PhET Simulations

Interactive science simulations. Physics, chemistry, biology, and math.

Falstad

Math and physics applets. Interactive simulations for learning.

MIT Physics OCW

Free MIT physics courses. From mechanics to quantum field theory.

Feynman Lectures

Richard Feynman's legendary physics lectures. Free online edition.

HyperPhysics

Encyclopedic physics reference. Concept maps connecting physics topics.

Chemguide

Chemistry tutorials for students. Clear explanations of chemistry concepts.

Organic Chemistry Portal

Organic chemistry resources. Reactions, mechanisms, and synthesis.

PubMed Central

Free archive of biomedical research. Millions of full-text articles.

bioRxiv

Preprint server for biology. New research before peer review.

arXiv

Preprint server for physics, math, and CS. Where new research appears first.

Semantic Scholar

AI-powered research tool. Find and understand scientific papers.

Google Scholar

Search scholarly literature. Papers, theses, and citations.

Sci-Hub

Free access to research papers. Controversial but used by millions.

Library Genesis

Free access to books and papers. Shadow library for research and textbooks.

Zooniverse

People-powered research. Help scientists with real research projects.

Foldit

Protein folding game. Play to help scientists understand diseases.

Edge

Conversations with scientists and thinkers. Big questions, deep answers.

Project Gutenberg

The original free ebook library. Over 70,000 public domain books, started in 1971.

LibriVox

Free public domain audiobooks read by volunteers. Thousands of classic books in audio format.

Internet Sacred Text Archive

Encyclopedic collection of religious, mythological, and folkloric texts. World's religions and esoterica.

JSTOR Open Content

Free access to thousands of academic articles and books. Scholarly research without paywalls.

Rhizome ArtBase

Archive of digital art from 1999 to present. Net art, software art, and born-digital works preserved.

CalSky

Astronomical calculations and events. Eclipses, transits, and occultations.

Public Domain Review

Curated essays on public domain works. Rediscovering forgotten treasures.

Basketball Reference

Complete basketball statistics. Every player, every game, every stat.

Pro Football Reference

Complete NFL statistics database. Historical and current stats.

FBref

Soccer/football statistics. Comprehensive data from leagues worldwide.

Podcast Index

Open podcast database. Supporting an open podcasting ecosystem.

levels.fyi

Tech compensation data. Compare salaries across companies and levels.

Old Maps Online

Portal to historical maps from libraries around the world. See how places looked centuries ago.

Computer History Museum

Exploring the history of computing. Online exhibits, timelines, and oral histories from tech pioneers.

Windows 3.1 Online

Run Windows 3.1 in your browser. Complete with Program Manager, File Manager, and classic apps.

Wayback Machine

Browse 800+ billion web pages saved over time. See how any website looked years ago.

RetroGames

Retro gaming database. Information on classic games and consoles.

EPA

U.S. Environmental Protection Agency. Environmental data and regulations.

IUCN Red List

Threatened species database. Conservation status of species worldwide.

World Wildlife Fund

Conservation organization. Protecting nature and wildlife.

Wolfram Alpha

Computational knowledge engine. Ask it math, science, or data questions and get computed answers.

MathWorld

Comprehensive mathematics encyclopedia. Definitions, theorems, and explanations for every math concept.

OEIS

Online Encyclopedia of Integer Sequences. Look up any sequence of numbers and find its mathematical meaning.

Rest of World

Tech reporting from outside the Western bubble. How technology shapes life in emerging markets.

Cameron's World

Web collage of text and images excavated from GeoCities. A memorial to the early web's creative chaos.

Gwern Branwen

Extensive essays on statistics, psychology, technology, and self-experiments. A masterclass in long-form web writing.

Internet Archive

Digital library offering free access to books, movies, software, and the Wayback Machine for web history.

Low-Tech Magazine (Solar)

A solar-powered website about sustainable technology and historical alternatives. Goes offline when the sun doesn't shine.

Standard Ebooks

Free, carefully formatted ebooks of public domain literature. Beautiful typography, meticulous proofreading.

Our World in Data

Research and data to make progress against the world's largest problems. Free, open, accessible.

The Pudding

Visual essays that explain ideas through data and design. Journalism meets data visualization.

Distill

Machine learning research journal with interactive visualizations. Making ML concepts understandable.

Information is Beautiful

Award-winning data visualizations on everything from science to pop culture.