Science & Nature
1439 sites
Subcategories:
- Astronomy & Space (396)
- Chemistry (8)
- Earth Sciences (26)
- Biology (79)
- Physics (30)
- Mathematics (59)
- Weather & Climate (104)
- Amateur Radio (682)
- Electronics (47)
https://scottaaronson.blog/
Shtetl-Optimized is the long-running blog of Scott Aaronson, a theoretical computer scientist and quantum computing researcher, where he dives deep into complexity theory, quantum computing misconceptions, AI, and education policy. Known for its intellectual rigor and wit, it attracts readers from academia and beyond who enjoy substantive takes on math, physics, and the occasional culture-war skirmish in gifted education.
https://affy50.tripod.com/Eyepcalc.html
An interactive eyepiece calculator for amateur astronomers that computes magnification and true field of view based on telescope focal length and aperture. It includes a comprehensive built-in database of eyepieces from major brands like Celestron, Meade, Pentax, Vixen, and Zeiss, plus support for custom eyepiece data entry.
https://www.qsl.net/g7txq
The homepage for the Association of Norfolk RAYNET Groups, a UK-based amateur radio emergency communications network serving Norfolk. The site provides information about who they are, links to individual group websites, and resources pointing to other amateur radio sites.
http://gordonwestradioschool.com/
Gordon West Radio School, run by the well-known 'Gordo' (WB6NOA), offers ham radio licensing classes, study materials, books, tapes, and CDs for aspiring amateur and commercial radio operators across the US. The site covers FCC license preparation, ship and coast station licensing, weekend classes taught by Gordo-approved instructors, and training resources available through Ham Radio Outlet.
https://michaelbach.de/ot/index.html
Michael Bach's massive collection of 154 optical illusions and visual phenomena combines interactive experiments with scientific explanations grounded in vision research and perceptual psychology. Each illusion is presented with thoughtful commentary on how the brain's visual shortcuts create misleading interpretations, making this an exceptional resource for anyone curious about how human perception actually works.
http://uvaa.org/
The Utah Valley Astronomy Association (UVAA) is an informal stargazing club based in Utah Valley, founded in the early 1990s by Rich Tenney and maintained online by Paul Witte, offering a community for observational astronomy enthusiasts with no dues or obligations. The site preserves the club's history and hosts a notable Binocular Astronomy Resource Page, along with links to star parties, a member gallery, and connections to other Utah astronomy societies.
http://johncath.force9.co.uk/radio%20projects.htm
John Cath's radio project pages feature detailed amateur radio construction projects including a 17-page guide to building a 600W 50MHz solid state amplifier and a power splitter for 70cm. The site reproduces designs from RadCom magazine and the Radio Society of Great Britain, making it a useful reference for ham radio builders and experimenters.
http://mathpuzzle.com/loyd
Ed Pegg Jr's digitized archive of Sam Loyd's 1914 'Cyclopedia of 5000 Puzzles, Tricks, and Conundrums' presents the classic puzzle book as a complete set of scanned page images freely available for download. This rare public-domain release preserves one of the most celebrated puzzle collections in mathematical history, making it an invaluable resource for recreational mathematics enthusiasts.
https://rarclub.net/
The Richmond Amateur Radio Club (RARC) is a Virginia-based ham radio organization with sections covering licensing resources, club repeaters, nets, and public service events. Notable activities include Field Day operations, satellite workshops, balloon chase teams, and volunteer coordination for local community events like the Monument Avenue 10k.
http://fbdd-lit.blogspot.com/
Molecular Design is a scientific blog exploring the manipulation of molecular properties to control the behavior of compounds and materials, written by contributors including Mel Peter Kenny. Posts blend technical drug discovery topics like Hit to Lead optimization with personal observations from Trinidad and the UK, giving the site a distinctive voice that mixes rigorous science with vivid storytelling.