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://qsl.net/wa5mc
The Atchafalaya Amateur DX Association Inc. (AADXA) is a ham radio club based in Amelia, Louisiana, with a full organizational presence including officer listings, membership applications, meeting minutes, newsletters, and repeater information. Developed by Guy R. Morrison (WA5MC), the site also features field day photos, a guestbook, and club constitution documents, making it a solid hub for local amateur radio enthusiasts.
https://users.usinternet.com/n0flq
Collin Witwer (N0FLQ) is a ham radio operator from Minneapolis, Minnesota who built this sprawling personal homepage packed with categorized links covering everything from ham radio and shortwave to space, electronics, weather, and beyond. The site serves as both a personal hub and a massive curated web directory, with a QSL card, live webcam, and links to local Minnesota resources making it a genuine snapshot of late-1990s hobbyist internet culture.
http://solstation.com/habitable.htm
Sol Station explores the concept of habitable zones around stars, presenting scientific information about which stellar systems might support life. The site offers a visually driven look at astrobiology and planetary habitability, making complex astrophysics accessible to curious visitors.
http://arrl.org/
The American Radio Relay League (ARRL) is the official national membership organization for amateur radio operators in the United States, offering news, licensing resources, regulatory advocacy, and publications like QST magazine. A comprehensive hub for ham radio enthusiasts at every level, the site covers contests, digital networking, solar updates relevant to propagation, and community events.
https://fars.k6ya.org/
The Foothills Amateur Radio Society (FARS) serves amateur radio enthusiasts across the southern San Francisco Peninsula, including Los Altos, Palo Alto, and Mountain View. The site offers meeting schedules, repeater information, newsletters, membership management, educational resources, and details on special events like ARRL Field Day and the Electronics Flea Market.
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://insti.physics.sunysb.edu/physics/physics_links.htm
Maintained by Stony Brook University's physics department, this extensive link directory covers physics preprints, online journals, conferences, jobs, data sources, and institutions. Researchers and students will find hundreds of curated links spanning Physical Review, arXiv, SLAC SPIRES, astrophysics journals, and community resources like Fermilab and the Nobel Foundation.
http://hamuniverse.com/hamnews.html
Hamuniverse.com aggregates the latest ham radio news from major worldwide sources including ARRL, QRZ.com, Southgate ARC, and Amateur Radio Newsline, all from a single convenient page. Part of a larger amateur radio resource site, this news hub keeps operators informed on contests, satellite activity, licensing, and club events happening across the global ham radio community.
https://k5sld.org/
The Arlington Amateur Radio Club (K5SLD) is a community club based in Arlington, Texas, offering weekly nets on their 2-meter repeater, club dinners, licensing resources, and membership information. The site serves as the central hub for local ham radio operators to stay connected, pay dues, and participate in club events including CERT emergency response training.
https://ei7gl.blogspot.com/2026/02/video-solar-cycle-25-expectations-in.html
John, EI7GL, runs this long-running amateur radio diary covering propagation experiments, solar cycle updates, and band activity across frequencies from medium wave to microwaves. The site is a treasure trove for radio enthusiasts, featuring detailed posts on DX contacts, digital modes, and radio science with an impressive archive of callsigns and events.