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://wildflowers-and-weeds.com/
Thomas J. Elpel's plant identification hub teaches visitors to recognize wildflowers, weeds, and edible plants by learning the patterns of plant families rather than memorizing individual species. The site complements his book 'Botany in a Day' and includes slideshows, weed ecology, foraging guides, mushroom information, and online classes.
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://wm7d.net/
Mark Downing (WM7D) runs this ham radio hub featuring a searchable callsign database, real-time solar flux reports, and dedicated resource pages for Yaesu radios including the FT2000, FT920, and FT100. Visitors will also find DX cluster links, QSO maps, TR Log for Linux, and a curated collection of amateur radio links.
https://w1cdn.net/
W1CDN documents ham radio adventures with hands-on technical posts covering packet radio, homebrew builds, APRS digipeaters, and radio orienteering projects. The site features detailed notes on software configurations like direwolf and flrig, DIY hardware builds including a powered speaker and homebrew power meter, and practical guides for operating on various bands.
http://dxer.com/
DXer.com is a site centered around amateur ham radio and CW (Morse code) operation, catering to DXers who pursue long-distance radio contacts. The page appears minimal but targets a niche community of ham radio enthusiasts with an interest in DX chasing.
https://starastronomy.org/
STAR (Society of Telescopy, Astronomy, and Radio) is a Monmouth County, NJ amateur astronomy club founded in 1957, offering monthly meetings, star parties, observing nights, and public outreach programs for all experience levels. The site features sections on telescope making, light pollution, a spectrogram tool, member photos, and a picture of the day, making it a rich hub for local stargazers.
https://ncarrl.org/ares
The official site for North Carolina ARES (Amateur Radio Emergency Service) and AUXCOMM, coordinating amateur radio operators across all 100 NC counties for emergency communications support. It features a comprehensive county-by-county coordinator directory, training requirements, FEMA integration guidelines, and links to ARRL emergency planning documents.
https://www.qsl.net/lz1iii/html/1001link.html
A massive curated directory of amateur radio links maintained by LZ2HM, covering everything from ARRL resources and antenna plans to SSTV, ATV, antique radios, aurora monitoring, and weather resources. With over 1,300 links organized into dozens of categories, it serves as a comprehensive reference hub for ham radio operators of all interests.
https://sites.utexas.edu/n5xu
The University of Texas Amateur Radio Club (UTARC) has operated under the callsign N5XU since its founding in 1921, making it one of the longest-running college radio clubs in the country. The site covers club meetings, local nets, repeater information, and resources for getting a ham radio license, with membership open to all UT-affiliated students, faculty, and staff at no cost.
https://www2.math.uconn.edu/~glaz/Fun_Math_Links/index.html
Maintained by University of Connecticut math professor Sarah Glaz, this curated link collection gathers hundreds of resources covering math humor, mathematical poetry, math in film and theater, interactive geometry, famous problems, and career guidance. It serves as a rich undergraduate reference bridging serious mathematics with its cultural and creative dimensions.