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://sffma.net/
The South Florida FM Association (SFFMA) is a Miami-area amateur radio club operating multiple repeaters across the region, with real-time emergency status information and a live audio feed of their 147.000 MHz repeater. The site includes repeater listings, meeting schedules at the Miami-Dade EOC, member resources, and photo galleries of their tower and equipment installations.
http://discovercircuits.com/
DiscoverCircuits.com, run by engineer Dave Johnson P.E., is a massive repository of over 45,000 free electronic circuits and schematics cross-referenced across 500+ categories for engineers, hobbyists, inventors, and students. Online since 2002, it serves as a go-to reference for quick design ideas, circuit solutions, and component resources covering an enormous breadth of electronic applications.
https://skydiary.com/
Chris Kridler's Sky Diary is a long-running storm chasing site dating back to 1997, packed with chase journals, tornado and lightning photography, weather data, and kids' weather facts. A portal for Kridler's broader web presence, it connects visitors to storm chasing accounts, photography portfolios, videos, and live chase tracking.
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://fossils-facts-and-finds.com/
Fossils Facts and Finds is a comprehensive educational resource covering everything from fossil formation and identification to detailed pages on hundreds of specific species including trilobites, ammonites, dinosaurs, and megalodon. Aimed at kids, teachers, and homeschoolers, the site also spans the full geologic time scale, offers lesson plans, coloring pages, and even sells fossils and educational materials.
https://mdgeosociety.org/
The Maryland Geological Society is a non-profit club founded in 1991 for amateur and professional fossil and mineral collectors, open to all who share a passion for the geological sciences. Visitors will find meeting schedules, field trip announcements, fossil and mineral FAQs, a gallery, newsletter archives, and articles by contributing scientists.
http://sten.astronomycafe.net/the-astronomy-cafe
NASA scientist-educator Sten Odenwald has maintained this astronomy education hub for over 20 years, filling it with popular essays on cosmology, black holes, space travel, and the weird corners of nature. Visitors will find Q&A resources, blog posts on recent space discoveries, and details on his published books including a photo-filled history of space exploration through 100 iconic objects.
https://hurricanecity.com/
HurricaneCity, maintained by Jim Williams for over 25 years, is a comprehensive Atlantic hurricane tracking resource featuring a city and island database of historical landfalls, rankings, storm data by year, and the best-performing forecast model comparisons. Visitors can explore hurricane history by state, track current tropical systems, and access a wealth of tools including reconnaissance data, El Nino information, and multimedia archives like Hurricane TV and a radio show.
https://www.astronomynotes.com/
Nick Strobel's comprehensive Astronomy Notes covers everything from the scientific method and history of astronomy to telescopes, planetary science, and Einstein's relativity, originally written for his introductory astronomy courses. The site has been widely copied across the web as a testament to its value, and a printed edition is available through Kendall Hunt for those who want a physical copy.
http://gars.club/
The Gainesville Amateur Radio Society (GARS) is a club based in Gainesville, Florida, offering meeting schedules, repeater information, FCC license testing details, and resources for local ham radio enthusiasts. The site covers everything from Morse code history and VOIP for amateurs to club bylaws, awards, and a photo gallery of past activities.