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://harc.net/
The Huntsville Amateur Radio Club (HARC) is a 501(c)(3) nonprofit based in Huntsville, Alabama, dedicated to educating and training members in amateur radio with a focus on emergency communications support. The site offers access to club resources including a newsletter, repeater and net information, a classifieds section, SKYWARN and ARES/RACES emergency programs, and a DX club.
https://www.qsl.net/w5gfc
The W5GFC Greers Ferry Amateur Radio Club serves ham radio enthusiasts in the Ozark foothills of Arkansas, offering club news, repeater listings, VE exam info, QSL cards, and a photo album. Founded in the 1970s, this active club also coordinates emergency communications and hosts a weekly net on 147.330+.
https://fcrosby.com/ears
A historical archive of the Englewood Amateur Radio Society, preserving records and activities from 1999 to 2017. The site serves as a digital repository for this local ham radio club's legacy, offering a rare glimpse into nearly two decades of amateur radio community organizing.
http://kcaprs.org./
The Kansas City APRS Organization is a regional group dedicated to Automatic Packet Reporting System (APRS) activity in the Kansas City area. This site serves as the hub for local amateur radio operators interested in real-time digital position tracking and packet radio communications.
http://aleph0.clarku.edu/~djoyce/java/compass
David E. Joyce of Clark University presents a detailed mathematical exploration of compass-only geometric constructions, proving that a straightedge is unnecessary for any Euclidean construction. The site covers circle inversion, stereographic projection, inversive geometry, and involutory quandles, drawing on the historical work of Mohr and Mascheroni.
https://journal.seefar.dev/
Chris Farnham (W1YTQ) keeps this detailed journal covering Parks on the Air activations, antenna builds, QRP transceiver projects, and field operations across locations like Minute Man National Park and Peddocks Island. With over forty posts exploring CW/Morse Code operating, Reverse Beacon Network activity, and hands-on radio adventures, it is a rich resource for anyone interested in portable and outdoor amateur radio.
http://geologyshop.co.uk/
Geologyshop is a comprehensive geological reference hub offering curated links to over 1200 worldwide geology websites organized by subject, covering topics from dinosaurs and volcanoes to chalk formations and channel tunnel geology. Visitors can access free geological documents, maps, field guides, and educational content for students, teachers, and professionals interested in earth sciences.
http://ssbusa.com/
SSB Electronic USA is a Pennsylvania-based specialty retailer focused on VHF, UHF, and SHF amateur radio equipment, offering products like GaAsFET preamplifiers, transverter systems, low-noise LNAs, and satellite gear. Featuring brands such as MUTEK, M2 Inc., WinRadio, and AIRCOM, this mid-1990s catalog site serves serious ham radio operators and microwave enthusiasts looking for high-performance RF components.
http://starshadows.com/
Star Shadows Remote Observatory (SSRO) was a cooperative astro-imaging venture cofounded by Rick Gilbert, Jack Harvey, Steve Mandel, and John Pierce, producing deep-sky images from New Mexico and Cerro Tololo Inter-American Observatory in Chile from 2004 to 2018. The archived site offers access to their gallery, equipment details, and documents from over a decade of collaborative astrophotography.
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.