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://rfcafe.com/
RF Cafe is a comprehensive resource for RF and electronics engineers, offering formulas, reference data, vintage magazine archives, software tools, forums, and a massive parts and services directory. Running since 1996, the site blends technical depth with nostalgia, featuring scanned articles from classic publications like QST, Popular Electronics, and Radio-Craft alongside modern engineering utilities.
https://ve7sar.blogspot.com/
The digital home of the SARC Communicator, the newsletter of Surrey Amateur Radio Communications (VE7SAR) based in Surrey, BC, Canada. Each issue is packed with homebrew projects, DX expedition reports, radio history features, and equipment reviews, making it a rich resource for ham radio enthusiasts of all experience levels.
![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://vvara.org/index.html
The Verde Valley Amateur Radio Association (VVARA) serves ham radio enthusiasts in north-central Arizona, providing club meeting schedules, net listings, repeater information, and foxhunt resources. Regular nets like the Knobby Knee Net and 60s Trivia Net reflect an active local community, and the site even includes a live weather camera feed from Mingus Mountain.
https://tonylaubach.net/
Meteorologist Tony Laubach has documented his storm chasing adventures since 1997, with detailed chase logs spanning from the early 2000s all the way through 2026, including tornado intercepts and TWISTEX-era events. The site is a remarkable long-running record of a professional storm chaser's career, covering tornadoes, tropical weather, and celestial events alongside a regularly updated blog.
http://james.ahlstrom.name/pcr1000
James Ahlstrom shares his Python-based control software for the Icom PCR-1000 wideband radio receiver, covering the full 100 kHz to 1.3 GHz tuning range. The page includes setup instructions for Windows and Linux, download links for dependencies like pyserial and pywin32, and a practical explanation of how PC-controlled radio software works.
https://castfvg.it/galassie/indexgal.htm
An extensive galaxy catalog reference compiled by the Circolo Astrofili Talmassons (C.AS.T.), an Italian astronomy club, featuring member-photographed images organized across major catalogs including NGC, UGC, IC, PGC, Messier, and VCC. The site covers thousands of galaxies alongside deep sky objects, quasars, and galaxy clusters, making it a remarkable visual archive built collaboratively since 1996.
http://n5hq.com/
N5HQ is the personal ham radio site of an Extra Class operator licensed since 1978, covering SSTV, DSSTV, QSL cards, antenna design tools, and amateur radio licensing resources. The site also highlights the operator's involvement as an ARRL Volunteer Examiner, Skywarn weather spotter, and Ten-Ten International member.
http://mreclipse.com/MrEclipse.html
Fred Espenak, known online as MrEclipse, has built one of the most comprehensive eclipse resources on the web, covering solar and lunar eclipses with decades of photographs spanning from 1970 to the present. Visitors will find beginner guides, safety tips, photography tutorials, eclipse preview calendars, and an extensive archive of stunning eclipse imagery from expeditions around the world.
http://mineralzine.chez.com/
Mineral Webzine is a bilingual French-English non-commercial online magazine dedicated to rockhounds, mineral collectors, and geology enthusiasts. Featuring photographs of specimens like garnet, wulfenite, and cinnabar contributed by collectors from Canada and France, it serves as a reference for mineralogy, crystallography, and gemology.