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://marsradio.org/
Branson Repeaters serves the Missouri Ozarks Tri-Lakes area with a network of linked ham radio repeaters on 2 meters, 1.25 meters, and 70 cm, plus digital nodes connecting YSF, DMR Brandmeister, AllStarLink, and EchoLink. The site provides repeater frequencies, coverage details, hosted net schedules including a Skywarn Youth net, and local Branson weather from NOAA.
https://www.qsl.net/farc-sc
The FARC-SC (Frankfort Amateur Radio Club of South Carolina) hosts radio coverage maps and club resources for local ham radio enthusiasts. The site uses a frames-based layout typical of early 2000s web design, offering geographic signal coverage information relevant to the club's area.
![This Dynamic Earth--Contents [USGS]](/screenshots/15975.webp)
https://pubs.usgs.gov/gip/dynamic/dynamic.html
Published by the U.S. Geological Survey, this online edition of 'This Dynamic Earth' offers a comprehensive exploration of plate tectonics, from historical perspectives to modern understanding of mantle plumes and unanswered geoscientific questions. Written by W. Jacquelyne Kious and Robert I. Tilling, it covers the full text of the original 1996 print book and links to interactive companion resources including maps of volcanoes, earthquakes, and crustal movements.
https://www.qsl.net/ema-arrl/clublist.html
A comprehensive directory of amateur radio clubs across Eastern Massachusetts, organized under the ARRL Eastern Massachusetts section. Visitors will find dozens of clubs listed by name with links, spanning general, repeater, packet, contest, school, and company club categories.
http://laughton.com/paul/rfo/rfo.html
Named in honor of Nobel Prize-winning physicist Richard Feynman, this amateur astronomy site showcases CCD astrophotography of nebulae, planets, and galaxies captured through telescopes ranging from a 4-inch Takahashi to a Celestron C11. Visitors will find detailed equipment reviews, imaging guides, comet and planet sequences, and a rich gallery of deep-sky objects including the Horsehead Nebula, M42, and Hale-Bopp.
http://charlieselectronics.com/
Charlie's Electronics is the home base of AB5U, a Dallas-area ham radio operator running multiple UHF and VHF repeaters across the Dallas-Rowlett-Garland region. The site covers amateur radio topics, two-way radio repair services, off-grid power and cooling for field operations, and practical electronics tips.
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://dx4win.com/
DX4WIN is a logging and DX management software site for amateur radio operators, focused on tools to track contacts and DX entities. The site uses a frames-based layout typical of early web design, suggesting it has been around since the early days of the internet.
https://solarpower.guide/
Bob Robertson's hobby site is a sprawling reference on solar power, covering everything from basic definitions and how solar panels work to educational guides for kids and van-life solar setups. With dozens of articles on renewable energy topics, it reads like a one-man encyclopedia built by a retiree passionate about the subject.
https://n3wnb.tripod.com/
Tim Ingram (N3WNB) of Corry, PA built this ham radio page featuring a callsign lookup tool and a curated collection of links to resources like the ARRL, QRZ, and equipment suppliers. The site also highlights his Yaesu FT-847 rig and includes a local hams email list, giving it a personal community flavor alongside the standard reference links.