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)
http://qth.com/w0aih
The W0AIH Contest Station site documents an impressive amateur radio operation spread across 120 acres of Wisconsin farmland, featuring over 50 towers and six HF operating positions. Built as a tribute to Paul Bittner W0AIH (1933-2018), the site covers the station's hardware, operators, antennas, and the storied history of 'The Farm' that became a landmark visible from Interstate 94.
https://diptera.info/weblinks.php?cat_id=1
Diptera.info is a comprehensive portal dedicated to the insect order Diptera, covering flies, midges, and gnats with galleries, checklists, catalogues, and an active identification forum for researchers and enthusiasts worldwide. With over 5,000 members, a larva gallery, downloadable articles, and curated web links to scientific collections and catalogues, it serves as a serious reference hub for dipterists at all levels.
https://barriearc.com/
The Barrie Amateur Radio Club (VE3GCB) is a Canadian ham radio club based in Barrie, Ontario, offering monthly meetings, beginner licensing courses, a builders group, and a variety of on-air activities including DMR and HF propagation. The site covers club repeater info, AUXCOMM emergency communications, 3D printing projects, and community events, making it a rich hub for local amateur radio operators of all experience levels.
https://mrasz.hu/
The Magyar Rádióamatőr Szövetség (MRASZ) is the official national amateur radio society of Hungary, organizing contests, events, and news across shortwave, UHF, radio direction finding, and high-speed telegraphy disciplines. The site features competition announcements, a QSL bureau, licensing information from the NMHH authority, and resources for Hungarian radio amateurs at all levels.
https://www.qsl.net/9m6aac/old/aacmem.htm
The Hillview Gardens Amateur Radio Club (9M6AAC), based in Keningau, Sabah, Malaysia, maintains this membership directory listing callsigns and contact details for its globally dispersed ham radio members. The roster spans operators from dozens of countries, reflecting the club's mission of promoting worldwide friendships through amateur radio.
https://qsl.net/aa3rl/ant2.html
Mike Banz (AA3RL) breaks down the technical question of dipole antenna height with detailed radiation pattern analysis, helping amateur radio operators choose the right height for DX work, local nets, or directional operation. The page features multiple elevation pattern plots comparing dipole performance at various heights, making it a practical reference for hams planning their antenna installations.
http://dendro.cnre.vt.edu/
Virginia Tech's Dendrology and Forest Biology site is a comprehensive academic resource for tree identification, featuring factsheets, ID keys, a vTree app, and databases covering superlative and remarkable trees. Built by Dr. John Seiler, John Peterson, and collaborators, it serves as a go-to reference for students, landowners, and naturalists interested in woody plants across North America.
https://www.qsl.net/gara
GARA (Greater Area Radio Association) hosted its club site on QSL.net, featuring repeater listings, member rosters, and information about joining the group. The file index reveals pages covering multiple frequency bands (50, 144, 222, and 440 MHz) along with affiliations with ARES, RACES, SKYWARN, and ham radio webrings typical of late-1990s amateur radio club sites.
https://mainearrl.org/
The official Maine Section page for the American Radio Relay League covers everything local hams need, including district info, repeater listings, emergency communications nets, and an upcoming hamfest convention in Augusta. Resources for mentors (Elmers), club listings, EMCOMM testing, and multiple nets like the Maine Seagull Net and Maine Public Service Net make this a practical hub for amateur radio operators across the state.
http://n5hq.com/
N5HQ is the personal ham radio site of an Extra Class operator licensed since 1978, covering SSTV, DSSTV, QSL cards, antenna design tools, and amateur radio licensing resources. The site also highlights the operator's involvement as an ARRL Volunteer Examiner, Skywarn weather spotter, and Ten-Ten International member.