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://abrohamnealsoftware.com/
Neal K3NC's retirement announcement page for Abroham Neal Software, a company that developed amateur radio software including DXBase 2007 for logging and DX cluster operations. The site now serves as a legacy resource, offering free registration files and key generation tools for former customers of the now-closed software business.
http://webmineral.com/danaclass.shtml
Webmineral presents a comprehensive classification of mineral species based on Dana's New Mineralogy, organizing over 78 mineral classes from Native Elements to Unclassified Silicates. This detailed reference resource covers the full spectrum of mineralogy including sulfides, oxides, halides, carbonates, and silicates, making it an invaluable tool for geologists, mineralogists, and earth science enthusiasts.
http://astroverde.org/
Astroverde is the official website of the Astronomers of Verde Valley, an amateur astronomy club based in Northern Arizona's Verde Valley region. Visitors can browse member astrophotography galleries, find star party schedules, access observing tools, and learn how to join the club.
https://w9cva.org/
The Chippewa Valley Amateur Radio Club (CVARC) is a Wisconsin-based ham radio club offering licensing classes, repeater networks, hamfests, and member resources for both newcomers and seasoned operators. The site features club news, ongoing projects like a remote SDR receiver and a permanent club station, equipment sales, and links to their extensive repeater infrastructure across the region.
http://theperksofchasing.com/
A memorial site preserving the storm chasing adventures of Jeff Wear, who was tragically killed in a traffic accident in 2005 at age 27 while returning from chasing Hurricane Dennis. Maintained by his family, the site features chase accounts, videos, images, and weather summaries from Jeff's years of dedicated storm chasing based out of Norman, Oklahoma.
http://hamuniverse.com/hamnews.html
Hamuniverse.com aggregates the latest ham radio news from major worldwide sources including ARRL, QRZ.com, Southgate ARC, and Amateur Radio Newsline, all from a single convenient page. Part of a larger amateur radio resource site, this news hub keeps operators informed on contests, satellite activity, licensing, and club events happening across the global ham radio community.
https://hermetic.ch/cal_stud/jdn.htm
Peter Meyer's detailed reference article explains the Julian Day Number system, covering its origins, astronomical vs. chronological uses, and various related date formats like Modified Julian Day Numbers and Lilian Day Numbers. The page includes conversion algorithms and links to calendar software tools, making it a thorough technical reference for astronomers, historians, and calendricists.
https://darc.de/home
DARC (Deutscher Amateur-Radio-Club e.V.) is the official national organization for amateur radio operators in Germany, offering member services, licensing information, contest coordination, and club resources. With sections covering HF, VHF/UHF/SHF, emergency communications, DX, and youth training, it serves as a comprehensive hub for the German ham radio community.
https://panspermia.org/
Cosmic Ancestry is a deep-dive scientific resource exploring the theory of panspermia, arguing that life on Earth originated from space and that all evolutionary innovation depends on genetic material of cosmic origin. The site covers astrobiology, comets as delivery systems, interstellar dust, the work of Fred Hoyle and Chandra Wickramasinghe, and presents extensive evidence comparing Darwinism with the Cosmic Ancestry hypothesis.
https://electronbunker.ca/eb/Links.html
A curated links page from the Electron Bunker site, gathering forums, personal pages, and resources dedicated to crystal radios, homebrew radio building, and vintage vacuum tube electronics. Regularly maintained and updated, it helpfully flags disappeared sites with Wayback Machine archives so enthusiasts can still access classic content.