Science
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Simulating Fluids, Fire, and Smoke in Real-Time
A richly illustrated walkthrough of how real-time fluid, fire and smoke simulation works, with live demos that show each…
Simulating Jupiter: Flowfields
A technical artist's visual breakdown of building a swirling Jupiter simulation with flow fields, showing the look of th…
Simulation, Consciousness, Existence
Hans Moravec's 1998 essay on whether we might live in a simulation, mixing ideas about computation, mind and the nature…
Singingbanana
Mathematician James Grime's site of recreational math curiosities, from intransitive dice to prime number oddities, writ…
Singularity Hub
A site covering breakthroughs in AI, biotech, and other exponential technologies through the lens of long-term futurist…
Sixty Symbols
Short, quirky videos from University of Nottingham physicists explaining the symbols and puzzles of physics and astronom…
Skeptical Inquirer
The magazine of the scientific skepticism movement, publishing investigations that examine extraordinary claims with rig…
Skeptical Science
A reference site that examines what peer-reviewed research actually says about climate change, methodically rebutting ne…
Skeptoid
A podcast and companion site applying critical thinking and scientific evidence to debunk urban legends, myths, and popu…
Skinny Bob
A long, meticulous frame-by-frame investigation of the infamous Skinny Bob alien footage, weighing visual effects clues…
SkinSort Ingredient Analyzer
A skincare tool that turns any pasted cosmetic ingredient list into an easy-to-read, science-backed breakdown of what ea…
Skullsite
A huge personal collection of bird skulls, photographed and identified species by species, with skeletons, 3D models and…
Sky & Telescope
A long-established astronomy magazine site with news, observing guides, sky charts, and equipment reviews for amateur st…
Sky Lapse in Two Tone
A look at Sentinel-1 radar satellite imagery that reveals ships, wind farms and rigs in the English Channel and other bu…
Sky Lights
An astronomy blog about the night sky and the distant objects seen by telescopes like the James Webb, written for curiou…
Sky Vistas
Austrian astrophotographer Gerald Rhemann shares deep-sky images of comets, nebulae and galaxies captured from dark-sky…
SKYGLOW
A crowdfunded astrophotography and timelapse project by Gavin Heffernan and Harun Mehmedinovic, chasing the darkest nigh…
Skyglow Light Pollution Simulator
A browser-based light pollution simulator that uses real photometric data from lighting files to show how a luminaire co…
SkyLens
A live 3D tracker of the ISS, Starlink trains and thousands of satellites above you, plus a browsable archive of declass…
SkyMapper Sky Viewer
An interactive sky viewer for the SkyMapper Southern Sky Survey, letting you pan across the stars and galaxies of the so…
SkyTruth Cerulean
A free map that uses satellite radar to detect oil slicks on the world's oceans, with filters for marine protected areas…
SkyViewer
An interactive star visualization that lets you pan and zoom across the night sky and explore a catalog of around 100,00…
Slate Star Codex
The archive of Scott Alexander's famous blog, thousands of long essays on psychology, medicine, culture and ideas, inclu…
Sleep Advice, Mattress & Product Reviews | Sleep Foundation
Evidence-based resource on sleep health, disorders, and treatments alongside expert-tested mattress and bedding reviews.
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