Science & Nature
1413 sites
Subcategories:
- Astronomy & Space (390)
- Chemistry (7)
- Earth Sciences (24)
- Biology (76)
- Physics (29)
- Mathematics (51)
- Weather & Climate (100)
- Amateur Radio (681)
- Electronics (45)
https://qrz.com/cgi-bin/webcall
QRZ.com is the premier ham radio callsign lookup database, allowing operators to search for licensed amateur radio users by callsign, name, address, grid square, or county. Beyond the core database, the site offers logbooks, DX spotting, forums, exam practice, license renewals, and a bustling swap meet for ham radio gear.
https://elm-chan.org/
ChaN's personal electronics engineering site showcases hobby projects, technical notes, and software tools shared with enthusiasts worldwide, including the widely-used FatFs filesystem module for embedded systems. The site blends circuit designs, fluorescent lamp ballasts, and downloadable code under a Creative Commons license, making it a genuine resource for hardware hobbyists.
http://ibiblio.org/pub/academic/agriculture/agronomy/ham/BOATANCHORS
Hosted on ibiblio, this is an archive of the Boatanchors mailing list digests, covering vintage and antique radio equipment collecting and restoration. The archive spans hundreds of digest issues alongside FAQs, welcome files, and supplementary resources for enthusiasts of classic tube-based radio gear.
http://atoptics.co.uk/
Atmospheric Optics (atoptics.co.uk) is a comprehensive reference site dedicated to the science of light phenomena in Earth's atmosphere, covering rainbows, halos, glories, coronas, mirages, green flashes, and much more. With an optical phenomenon of the day (OPOD) feature, a blog, and detailed explanations of how sunlight interacts with atmospheric particles, it is an essential resource for anyone curious about the colorful mysteries of the sky.
http://solstation.com/life.htm
SolStation.com hosts detailed information about nearby star systems and the search for extraterrestrial life, making it a rich reference for amateur astronomers and space enthusiasts. The site explores the habitability of star systems within our cosmic neighborhood, combining scientific data with accessible writing.
https://rars.org/
The Raleigh Amateur Radio Society (RARS) is an active ham radio club based in Raleigh, North Carolina, offering membership meetings, public service events, license classes, and the annual RARSfest hamfest. The site serves as a hub for local hams with announcements covering field days, emergency communications, portable operating events, and resources for newcomers through its Ham Tracks program.
https://qsl.net/w6ci
Larry Marshall, callsign W6CI, shares his passion for amateur radio through this classic hobbyist homepage hosted on QSL.net, a dedicated ham radio web community. Visitors will find multiple photo albums, an introduction to the world of ham radio, and a glimpse into Larry's life as a licensed operator based in Fontana, California.
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://capitalastronomers.org/
The National Capital Astronomers is a Washington D.C. metro area nonprofit astronomy club founded in 1937 at the US Naval Observatory, offering monthly star talks, public telescope events at Rock Creek National Park, and science fair outreach programs. Members and visitors can find meeting lecture videos, telescope-making workshop info, stargazing tips, and membership details for this long-running amateur astronomy society.
https://pfaf.org/user/Default.aspx
Plants For A Future (PFAF) is a searchable database of over 8,000 plants catalogued by their edible, medicinal, and other practical uses, making it an essential reference for permaculture enthusiasts and herbalists alike. The site covers topics ranging from food forests and carbon farming to rare and unusual perennial plants, with browsable indexes and habitat guides built up over decades by a UK-registered charity.