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://ento.csiro.au/biology/fly/fly.html
Developed by CSIRO Entomology researchers, this anatomical atlas provides detailed visual and educational reference material covering the morphology of flies (Diptera), originally built in Flash and converted to HTML in 2023. A collaboration between CSIRO and ABRS, it includes identification keys and anatomical glossaries for fly families found in Australia, making it a valuable tool for entomologists and biology students alike.
https://solar.lowtechmagazine.com/
Low-tech Magazine is a solar-powered publication that challenges high-tech assumptions by exploring low-energy, sustainable, and often obsolete technologies as practical alternatives to modern power-hungry solutions. Visitors will find detailed DIY guides for solar-powered appliances, historical analyses of pre-industrial techniques, and thought-provoking essays on energy, heating, cooking, and sustainable living.
https://qsl.net/sandra/APRS_primer.html
A focused primer on APRS (Automatic Position Reporting System) for the San Diego area, explaining how the technology uses GPS and two-meter radio to track vehicles, search and rescue teams, ships, and aircraft. Hosted on QSL.net and maintained by the San Diego Repeater Association, the page collects key links for getting started with APRS including software downloads, station locators, and local elmers.
https://www.qsl.net/farg
The Friends of Amateur Radio Group (FARG), operating under callsign N9LCR, is a Chicago-area amateur radio club promoting radio knowledge, fraternalism, and community outreach through multiple digital and Allstar nets. The site connects members and visitors to club nets like the Net with No Name, Teapots Tech-Friday Net, and Kidz Connection Net, and features event coverage from Field Day and the Yuma Hamfest.
http://monitoringtimes.com/html/mttopHF.html
Monitoring Times presents a curated list of over 1000 active HF frequencies compiled by Larry Van Horn (N5FPW), covering military, marine, government, and civil air patrol communications worldwide. A valuable reference for shortwave listeners and scanner enthusiasts, the list spans frequencies from 2 MHz to nearly 30 MHz with detailed mode and geographic information.
http://uvaa.org/
The Utah Valley Astronomy Association (UVAA) is an informal stargazing club based in Utah Valley, founded in the early 1990s by Rich Tenney and maintained online by Paul Witte, offering a community for observational astronomy enthusiasts with no dues or obligations. The site preserves the club's history and hosts a notable Binocular Astronomy Resource Page, along with links to star parties, a member gallery, and connections to other Utah astronomy societies.
https://john.pane.net/
John Pane is a Ph.D. computer scientist and senior researcher at RAND Corporation whose homepage highlights his work in education technology and personalized learning. A standout feature is his astrophotography gallery, showcasing personal photos of stars, nebulae, comets, and a solar eclipse, which gives the site a compelling scientific hobby dimension.
https://lakeneosho.org/King1.html
Professor of Geology Norman R. King documents the Pennsylvanian-age rock exposure uncovered during I-170 highway construction in St. Louis, Missouri, with detailed photographs and technical discussion of the Altamont Formation. This site is a niche academic resource for geology enthusiasts and paleontologists interested in Carboniferous stratigraphy and fossils from the American Midwest.
https://ei5di.com/
Paul O'Kane EI5DI offers SD, a free and actively maintained contest logging software for amateur radio operators running on Windows and Linux. The site also features Paul's personal commentary on ham radio topics, DXpedition stories, and resources like DXCC country files and Super Check Partial databases.
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.