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://www.qsl.net/nx0g
The Mountain Amateur Radio Club (MARC) is a ham radio club based in Teller County, Colorado, serving local amateur radio enthusiasts in the region. This page is a redirect notice pointing visitors to the club's new home at nx0g.org, with very little remaining content at this location.
https://bacteria.icu/
Stanislaus runs this enthusiastically nerdy site dedicated to prokaryotes and bacteria, complete with a gallery, wiki, and guestbook hosted on Neocities. The playful 'Bacteria Intensive Care Unit' theme and self-described obsession with microbiology make it a charming corner of the web for fellow microbe enthusiasts.
https://www.qsl.net/wb1asl
WB1ASL's personal ham radio page dedicated to vintage 'boatanchor' radio equipment, featuring Rich's own collection including a Hammarlund HQ-170 and a Lil' LuLu prototype. The site also curates shortwave listening links including Glenn Hauser's World of Radio and DXing resources for radio enthusiasts.
https://tube.be/
A specialized reference guide cataloging the vacuum tube types used in shortwave radio broadcast transmitters, organized alphabetically and numerically for easy lookup. The site also lists manufacturers, rebuilders, and distributors worldwide, including companies like Thales, Eimac, Penta Laboratories, and Xuguang, making it a practical industry directory for broadcast engineers.
https://kb8vsr.tripod.com/index.html
Shane Worth, callsign KB8VSR, runs this General Class amateur radio personal site featuring sections on SSTV (slow-scan television), a logbook, ham radio links, and an introduction to what ham radio is. A classic old-web ham shack homepage with multiple navigation sections that give a solid overview of one operator's on-air activities.
https://www.qsl.net/7n3wvm
MINOWA Makoto (7N3WVM) shares detailed homebrew QRP amateur radio projects built entirely from scratch at his shack in Chiba, Japan. Visitors will find construction guides for transceivers, antenna tuners, crystal filters, frequency markers, magnetic loop antennas, and various measurement tools, all documented in both Japanese and English.
https://pk3.org/Astro/index.htm?k3ccdtools.htm=
Peter Katreniak's astronomy page covers CCD imaging and observations of planets, the Moon, the Sun, eclipses, and deep-sky objects. A hobbyist astronomer's showcase featuring telescope photography and tools like K3CCDTools, making it a great find for amateur astrophotographers.
http://webmineral.com/
Webmineral is a comprehensive mineralogy database created by David Barthelmy, cataloging 4,714 individual mineral species with detailed descriptions, crystal structure viewers, X-ray data, chemical formulas, and an extensive image library. Its interactive Java-powered crystal viewers, searchable indexes across dozens of physical and optical properties, and multi-language support make it an invaluable reference for geologists, collectors, and mineral enthusiasts alike.
https://minnesotasky.tripod.com/
The Steele County Astronomical Society (SCAS) is an Owatonna, Minnesota-based astronomy club affiliated with the Astronomical League, organizing events like Messier Marathons, park viewing nights, and observatory tours. The site lists the club's annual schedule, membership information, and links to the Owatonna Clear Dark Sky Report for planning observation sessions.
https://qsl.net/kb1ckf/ham_radio_links.htm
Mike (KB1CKF) has assembled a comprehensive ham radio links page covering SATERN emergency communications chapters, Massachusetts amateur radio clubs, ARRL resources, repeater directories, and major radio equipment manufacturers. A handy reference for New England amateur operators, with particular emphasis on emergency radio networks and local clubs in the Eastern Massachusetts area.