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://vectorbd.com/sw_review.html
Compiled by John Lloyd (KE4UTX), this site collects shortwave receiver reviews submitted by readers of the Rec.radio.shortwave newsgroup, covering dozens of models from brands like Sony, Grundig, Icom, Kenwood, and Sangean. Each review includes pricing, dimensions, and hands-on user impressions, making it a practical reference for shortwave enthusiasts comparing receivers.
https://illinoiswildflowers.info/
Created by Dr. John Hilty, Illinois Wildflowers is a comprehensive botanical reference covering prairie, woodland, wetland, savanna, and weedy wildflowers native to Illinois, complete with plant-feeding and flower-visiting insect databases. The site's depth is remarkable, extending beyond flora to include vertebrate animal interactions, botanical and ecological terminology, and detailed photo documentation built over nearly two decades.
https://www.qsl.net/kb9ocq/index.html
Dale Catron (KB9OCQ) built this ham radio personal page focused on the 2-meter band, featuring antenna specs, repeater information, and a dense collection of links covering equipment brands like Icom, Yaesu, Kenwood, and Alinco. The site also includes FCC rules, online practice exams, ARRL resources, and participation in multiple amateur radio webrings from the late 1990s.
https://pierplates.com/
Dan's Pier Top Plates is a small business site selling custom mounting hardware for backyard telescopes, including pier top plate systems, DIY telescope enclosures, and adapters for metal piers. Hobbyist astronomers looking to build a permanent concrete or metal telescope pier for a home observatory will find products, FAQs, and installation guides here.
https://www.qsl.net/in3vrr
Roberto Vendrame (IN3VRR) out of Bolzano, Italy offers LOGvrr, a freeware amateur radio logging suite featuring a logbook, international callbook with 1.8 million entries, and PacketCluster support. The site provides free downloads of the software in ARJ archives, ISO disc images, and supporting utilities for ham radio operators managing QSOs and LoTW confirmations.
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.
http://stratigrafia.org/cincy
Created by Steven Holland of the UGA Stratigraphy Lab, this site documents the extraordinary fossil record and rock strata of the Upper Ordovician near Cincinnati, Ohio, covering over 470 genera and 1200 species. It combines detailed paleontology with cutting-edge stratigraphic interpretation, making it a valuable reference for both professional researchers and amateur fossil enthusiasts.
https://members.tripod.com/~Hamnut_2/index.htm
Larry Miller (KB5ITT) shares his adventures installing ham radio repeaters on mountain peaks in the San Juan Mountains of southwestern Colorado, blending technical radio work with exploration of ghost towns and scenic four-wheeling routes. The site covers two specific mountain-top repeater builds near Silverton, historical photography of old mining towns like Animas Forks, and off-road trail information for the region.
http://bcfmca.bc.ca/
The British Columbia Frequency Modulation Communications Association (BCFMCA) is a registered Canadian amateur radio charity operating VHF, UHF, and microwave repeaters across British Columbia, including FM, DMR, IRLP, and D-STAR modes. Visitors can check live system status, explore the repeater directory, browse coverage maps, and find membership and donation information for this active ham radio club.
https://pcars.org/wp
The Platinum Coast Amateur Radio Society (PCARS, callsign W4MLB) is a Florida non-profit club serving amateur radio operators in central and southern Brevard County for over 60 years. The site covers club membership, monthly meetings, the Melbourne Hamfest, VE licensing exams, ARRL Field Day, emergency nets, local repeaters, and mentorship resources for hams at every experience level.