Education
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CORE Econ
A free, open-access economics curriculum built by an international collaboration of economists, teaching the subject thr…
Core MBA
A free mini MBA with 16 courses on strategy, marketing, finance, AI, and leadership, taught through text-based business…
Corey Robin
The blog of political theorist Corey Robin, a professor at Brooklyn College and the CUNY Graduate Center, with essays an…
Cornell Home Gardening
Cornell University's home gardening hub with growing guides for flowers and vegetables, tips on choosing plants by size,…
Cornell University Library Online Exhibitions
Dozens of online exhibitions from Cornell's library, covering topics like bird extinction, glacial science, women botani…
Corpus Delicti: the Doctor as Detective
A Harvard online exhibition on the birth of forensic medicine, telling the story of its Department of Legal Medicine and…
Corpus of Contemporary American English
A massive searchable database of over a billion words of real American English, letting users see how words and phrases…
corvusfugit
A long-running image blog where every post is titled by a year, from prehistory to the present, pairing paintings, old p…
Corymbus
A free essay-form blog aiming to illuminate classical music for newcomers through accessible, in-depth writing on works…
Cosmic Microwave Background Radiation
A clear primer on the cosmic microwave background, explaining what cosmology studies and how this leftover glow reveals…
Cosmic Odometer
Calculates how far you have traveled through the universe since birth, using real physics data for Earth's motion, the s…
Cosmic View: The Universe in 40 Jumps
A page-by-page online copy of Kees Boeke's 1957 book Cosmic View, which zooms from a girl in a chair out to the edge of…
CosmoQuest
A citizen-science platform where volunteers help map craters and features on the Moon, Mars, and other worlds using real…
Could You Care Less?
A one-page explainer that shows why the common phrase "I could care less" is wrong, offered as a tool for helping simple…
country draw
A simple game that asks you to draw the outline of your country, or any country, from memory and then compares your wobb…
Country Duels
A daily geography quiz that gives you two countries at a time to compare, testing what you know about the world with one…
Country Sizes Compared to the USA
A visual article overlaying 30 countries on a map of the USA at true scale, correcting the distortions of flat world map…
CountryEconomy
A reference site with the latest economic and sociodemographic data by country, covering topics like GDP, debt, inflatio…
Courtenay Museum & Paleontology Centre Blog
A museum blog from Vancouver Island covering Cretaceous marine reptile fossils, local natural and cultural history, lect…
CourtListener
A non-profit legal search engine for case law, PACER documents, judges, and oral arguments, with alerts that update as n…
Cover Your Tracks
An EFF tool that tests your browser and shows how trackers see you, including how unique your browser fingerprint is amo…
Covert Shores
Independent naval analysis and open-source intelligence focused on submarines, unconventional warfare and special forces…
Coyote's Link Hub
An essayist's hub of curated links, essays and bookmarks, with a good web graveyard, a halloween web page, and handy gui…
Craft Yarn Council Knitting Guide
Step-by-step knitting and crochet instruction from the Craft Yarn Council, starting with the garter stitch for complete…
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