Science
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Classics of Science Fiction
A site remembering the best short science fiction, with ranked lists built from anthologies, essays on what makes a clas…
Clavius Moon Base
A classic debunking of moon landing hoax claims, with photo analysis and physics that explain each conspiracy argument p…
CleanTechnica
A clean energy news and commentary site covering solar, wind, electric cars and other sustainable technology with daily…
Clear Dark Sky
Star-gazing weather forecasts in clear-sky chart form, showing hour-by-hour cloud cover, transparency, and seeing for th…
Clear Outside
An international weather forecast built for astronomers, showing cloud cover, seeing, and moon conditions hour by hour f…
Clear Sky Alerts
A notification service for stargazers that sends a push alert when the sky over your location is forecast to be clear, s…
Clear Sky at Night
A set of reimagined skyline photos from cities around the world that reveal how the night sky would look without light p…
Cleveland Clinic Health Essentials
Cleveland Clinic's health and wellness hub, with expert-written articles on conditions, nutrition, fitness, and everyday…
CleverMind Teasers
Interactive visualizations of probability puzzles like the 100 Prisoners Problem, with simulations you can run and tweak…
Click the Colour and Not the Word
A Stroop-style reaction game with five levels of rising distraction against the clock, where you must click the ink colo…
Climate Action Tracker
An independent scientific analysis that visually tracks and rates government climate pledges and policies against global…
Climate Change Evidence
NASA lays out the evidence for rapid climate change - ice cores, rising seas, shrinking ice sheets, warming oceans - wit…
Climate Change Tracker
An open-data hub with 200+ dashboards and 1100+ charts tracking global warming, emissions, sea level and more, with nati…
Climate Crisis Font
A free variable typeface whose letterforms thin and melt in step with decades of Arctic sea ice data, so you can type a…
Climate Pulse
Near real-time interactive charts of global air and sea surface temperatures from Copernicus, letting you compare each d…
Climate Reanalyzer
A research tool from the University of Maine that generates live, interactive charts of global temperature, sea ice, and…
Climate TRACE
A coalition using satellite data and AI to independently track greenhouse gas emissions from individual power plants and…
Climate Villains
A free, open league table of the biggest climate polluters, ranking companies, countries, and sectors by measured emissi…
Climate Watch
An open data platform from the World Resources Institute tracking greenhouse gas emissions and countries' climate commit…
Climate.us
Independent nonprofit climate science site with plain-language explainers, maps and blogs, including the ENSO blog that…
ClimateFinder
A tool where you choose months of travel and your ideal temperature, rain, wind, sunshine, frost days, and humidity, the…
Close-up Photographer of the Year 7
A gallery of the top 100 images from the seventh Close-up Photographer of the Year contest: insects, plants, fungi, unde…
Cloth Simulation
A browser cloth simulation you can drag, pull and tear in real time, a satisfying little physics toy built from a grid o…
Cloud Appreciation Society
A society of over 60,000 members united in the belief that clouds are unjustly maligned, sharing a daily cloud photo and…
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