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://w9smc.com/
The Society of Midwest Contesters (SMC) is a club uniting amateur radio operators across the Midwest who compete in radio contesting events, with resources covering membership, awards programs, VHF contesting, and call area records. The site features a championship medals leaderboard, annual SMC Fest gathering details, contest calendars, and a contesting library making it a hub for competitive ham radio operators in the region.
https://jonasparnow.xyz/
Jonas Parnow's curated blog collects 59 handpicked articles, films, podcasts, and data visualizations focused on the climate crisis, from India's solar energy rise to European wildfires. Each entry is carefully selected and contextualized, making it a thoughtful and opinionated guide to understanding the accelerating climate emergency.
https://hamfest.org/
The Huntsville Hamfest is one of the longest-running amateur radio events in the United States, held annually since 1954 at the Von Braun Center in Huntsville, Alabama. In 2026 it will host the ARRL National Convention, featuring a dealer show, flea market, forums, licensing opportunities, and activities for the whole family.
https://qsl.net/ct1nmv
The Radio Scouting Department (Departamento de Rádio Escutismo) of the Moinhos de Vento Scout Group in Portugal claims to be the first Portuguese page dedicated to radio scouting, covering Jamboree-on-the-Air (JOTA), JOTI, QSL galleries, frequencies, repeaters, and amateur radio specialties for scouts. With dozens of sections including DXCC, IOTA, telegraphy, scout call books, and historical records, this is a rich resource for the intersection of amateur radio and the scouting movement.
http://astronomynv.org/
The Astronomical Society of Nevada (ASN) has been promoting astronomy education and public outreach since 1934, making it one of the longer-running amateur astronomy clubs in the region. Visitors can find club membership info, meeting schedules at the Fleischmann Planetarium in Reno, observing resources, photo galleries, and details on events like Messier marathon nights.
https://members.tripod.com/~Hamnut_2/index.htm
Larry Miller (KB5ITT) shares his adventures installing ham radio repeaters on mountain peaks in the San Juan Mountains of southwestern Colorado, blending technical radio work with exploration of ghost towns and scenic four-wheeling routes. The site covers two specific mountain-top repeater builds near Silverton, historical photography of old mining towns like Animas Forks, and off-road trail information for the region.
https://irts.ie/cgi/index.cgi
The Irish Radio Transmitters Society (IRTS) is Ireland's national amateur radio organization, offering licensing guidance, club directories, contest calendars, and membership services for ham radio enthusiasts across the country. Affiliated with the International Amateur Radio Union, the site serves as a central hub for Irish operators with resources covering repeaters, beacons, DXCC standings, awards, and emergency communications.
https://qsl.net/ka0loo
The Webster County Amateur Radio Club (WCARC) out of Fort Dodge, Iowa maintains this late-1990s club homepage covering membership info, meeting calendars, local repeater details, and ham radio resources. The site includes officer contacts, a classified market for used equipment, links to ARRL and QRZ, and even a sample license exam for prospective hams.
https://solorb.com/elect
FC's Electronic Circuits is a sprawling hobbyist archive packed with schematics and project descriptions covering everything from solar charge controllers and LED circuits to tube amplifiers, Geiger counters, and amateur radio gear. With dozens of original circuit designs, Arduino projects, and links to related ham radio and electronics builders, this site is a goldmine for DIY electronics enthusiasts.
https://qsl.net/kf4awn
Hosted on QSL.net, this site belongs to an amateur radio club (callsign KF4AWN) and includes member pages, club history, net operator information, and weekly breakfast meeting reports from 2010. The extensive member roster with individual callsign pages and multiple breakfast meeting logs suggest an active local ham radio club with a strong community presence.