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://grace.umd.edu/~tlaloc/archastro
The official web presence of the Center for Archaeoastronomy, a professional research organization founded at the University of Maryland in 1978, dedicated to the interdisciplinary study of astronomy in ancient and indigenous cultures. Visitors can explore peer-reviewed publications, newsletters, essays on ethnoastronomy, and learn about ISAAC, the international society promoting archaeoastronomy worldwide.
https://www.qsl.net/mara/index.html
The Madison Area Repeater Association (MARA) is a non-profit amateur radio club based in Madison, Wisconsin, affiliated with the Wisconsin Association of Repeaters. This page serves as a hub for club members, listing meeting times and locations while redirecting visitors to their newer site.
http://discovercircuits.com/
DiscoverCircuits.com, run by engineer Dave Johnson P.E., is a massive repository of over 45,000 free electronic circuits and schematics cross-referenced across 500+ categories for engineers, hobbyists, inventors, and students. Online since 2002, it serves as a go-to reference for quick design ideas, circuit solutions, and component resources covering an enormous breadth of electronic applications.
http://rocklandastronomy.com/
The Rockland Astronomy Club (RAC) is one of the East Coast's premier nonprofit astronomy education organizations, hosting star parties, lectures, dark sky observing sessions, and the renowned Northeast Astronomy Forum (NEAF). Visitors can find event schedules, observing locations at New York state parks, and information about joining a vibrant community of amateur astronomers.
http://n4nw.org/
Amateur radio operator N4NW runs a personal weather station in North Stafford, Virginia, reporting live conditions using a Davis Instruments Vantage Pro2 setup. The site offers current temperature, humidity, wind, rainfall totals, 5-day forecasts, radar links, and a local weather exchange network with neighboring stations.
https://cadcwww.dao.nrc.ca/
The Canadian Astronomy Data Centre (CADC) is an official Government of Canada research facility that archives and provides access to astronomical data for scientists and researchers. Hosted by the National Research Council of Canada, it serves as a centralized repository for observational astronomy data collections.
https://golem.ph.utexas.edu/string/index.shtml
The String Coffee Table is a collaborative group blog hosted at the University of Texas at Austin, bringing together physicists to discuss string theory, loop quantum gravity, conformal field theory, and related advanced topics. Posts make heavy use of MathML for rendering equations, and contributors include researchers like Urs Schreiber and Lubos Motl, making it a rich academic resource for cutting-edge theoretical physics.
https://cryothene.neocities.org/
Cryothene is a technically-minded personal blog covering electronics projects, embedded systems, reverse engineering, and 3D printing, with standout documentation of a custom display driver project called Sharpie spanning many installments. The site also mixes in anime opinions, game reviews, and occasional recipes, but the dominant draw is its detailed hardware and microcontroller writeups.
https://felderbooks.com/papers/godel.html
Kenny Felder offers a thorough and accessible explanation of Gödel's Incompleteness Theorem, drawing heavily on Hofstadter's 'Gödel, Escher, Bach' to walk readers through the mathematics and philosophy behind one of the most profound results in logic. Written in 1996, the piece explores formal axiomatic systems, Russell and Whitehead's Principia Mathematica, and the far-reaching implications of Gödel's work for mathematics, artificial intelligence, and the nature of mind.
https://www.qsl.net/k/kb7tbt//links
KB7TBT's ham radio links page is a well-organized curated directory of amateur radio resources spanning personal ham pages, local and national clubs, ATV groups, email forums, repeater councils, and commercial outlets. Created in 1998 and maintained through 2013, it serves as a comprehensive jumping-off point for hams interested in Arizona-area radio activity as well as broader national amateur radio communities.