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://eskimo.com/~oolon/paladin/index.html
The Paladin Contest Club is a casual amateur radio group centered around sharing a special club callsign for contests and mini-DXpeditions, with no formal score competition against other clubs. The site offers access to club bylaws, a member roster, contest scores, and logs, all coordinated by Jack Fleming (WA0RJY).
https://www.was.org.nz/useful-links
The Wellington Astronomical Society maintains this curated links page connecting visitors to astronomy resources across New Zealand and beyond, from national societies to educational tools for children. Organized into regional and international sections, it serves as a handy gateway to observatories, sky guides, STEM activities, and fellow astronomy clubs throughout New Zealand.
http://math.ucdavis.edu/~calculus
Calculus.org is a comprehensive educational hub hosted by UC Davis, offering step-by-step calculus problems, Java applets, Maple and Mathematica animations, and sample exams for both students and instructors. The site covers differential, integral, and multivariable calculus with resources ranging from humorous beginner guides to actuarial review problems, making it a well-rounded reference for anyone tackling the subject.
http://lightandmatter.com/binosky/binosky.html
BinoSky, created by Benjamin Crowell, is a comprehensive guide to stargazing with binoculars, organizing the best celestial objects to observe by region of sky and season. Visitors will find detailed entries on open clusters, globular clusters, nebulae, and galaxies visible through binoculars, complete with sky maps and a data table compiled by SEDS contributor Hartmut Frommert.
http://nsminerals.atspace.com/
Created by Ronnie Van Dommelen, this site is a dedicated reference guide to the mineralogy of Nova Scotia, Canada, covering locality information, mineral images, species studies, and reported minerals from the region. It highlights the province's world-class zeolites, Bay of Fundy collecting sites, and serves as an online resource for mineral enthusiasts and collectors worldwide.
https://w5yi.org/
W5YI Licensing Services Inc. is a nationwide Volunteer Examiner Coordinator (VEC) offering full-service amateur radio licensing support, including exam sessions, vanity call sign applications, license renewals, and club station licenses. The site also features a youth licensing program that covers FCC fees for applicants aged 25 and under, making it a practical hub for anyone pursuing or maintaining a ham radio license.
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.
http://lightningwizard.com/maps/usa.html
Lightning Wizard provides detailed convective weather forecast maps for North America, Europe, and the Caribbean, pulling data from the National Centers for Environmental Prediction and the National Weather Service. The site covers advanced meteorological parameters like CAPE, bulk shear, and MSL pressure across multiple forecast time intervals, making it a valuable tool for storm chasers and weather enthusiasts.
https://npl.washington.edu/AV/av_index_sub.html
John G. Cramer's subject index collects his long-running 'Alternate View' column from Analog Science Fiction & Fact Magazine, organizing hundreds of short essays on cutting-edge science into topics like quantum mechanics, cosmology, wormholes, and space drives. Running from 1984 to the present, this archive is a remarkable resource for hard SF readers and writers who want rigorous, accessible science writing from a working physicist.
https://www.qsl.net/vu2sdu
The personal homepage of Shaikh Sadaqathullah (VU2SDU), an amateur radio operator from Kayalpattinam, India, covering ham radio, Islam, Tamil culture, genealogy, and social causes like blood donation and peace activism. A wide-ranging old-web personal site with flash presentations, a photo gallery, and extensive links reflecting the creator's diverse interests and community values.