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://solar.lowtechmagazine.com/
Low-tech Magazine is a solar-powered publication that challenges high-tech assumptions by exploring low-energy, sustainable, and often obsolete technologies as practical alternatives to modern power-hungry solutions. Visitors will find detailed DIY guides for solar-powered appliances, historical analyses of pre-industrial techniques, and thought-provoking essays on energy, heating, cooking, and sustainable living.
https://inter-sol.org/
The INTER-SOL Programme (ISP), run by Volkssternwarte Paderborn e.V. in Germany, is an international citizen science initiative coordinating daily sunspot observations by amateur and professional astronomers since 1977. The site offers fundamentals about the sun, methods of sunspot counting and registration, an observers network, photo galleries, and INTER-SOL data archives, all presented in both English and German.
https://www.qsl.net/mvarg
The Mystic Valley Amateur Radio Group is a club based in eastern Massachusetts that meets monthly at Tufts University in Medford, welcoming anyone interested in the amateur radio hobby. The site lists club officers, repeater information, and a variety of ham radio links including ARRL resources, emergency management contacts, and local net listings.
https://rocksandminerals4u.com/
Rocks and Minerals 4U is a comprehensive educational resource covering geology topics including rock formation, mineral identification, plate tectonics, and the rock cycle, with dedicated pages for igneous, metamorphic, and sedimentary rocks. Designed for collectors, students, homeschoolers, and teachers, the site offers lesson plans, crossword puzzles, photo galleries, and even a shop for rock and mineral specimens.
http://blackcatsystems.com/
Black Cat Systems offers a wide catalog of Windows and macOS software focused on ham radio, shortwave listening, and audio utilities, including tools for SSTV decoding, ACARS, ALE, propagation forecasting, and Morse code training. The site serves as both a software storefront and a hub for amateur radio enthusiasts, with free trials available for most programs.
https://qsl.net/kd5fjm
The Dyess AFB Amateur Radio Club (DARC), callsign KD5FJM, is the official ham radio club for Dyess Air Force Base in Texas, featuring links to club news, member lists, station info, SKYWARN severe weather resources, and AF MARS connections. The site reflects a club in transition, actively seeking new leadership to revitalize its activities among amateur radio operators in the Dyess area.
https://www.qsl.net/w5wx
A QSL.net-hosted personal page for amateur radio operator W5WX, accessible via the QSL.net directory structure. The site appears to be a file index for a ham radio enthusiast's web presence on one of the most popular amateur radio hosting services.
https://winsystem.org/
The WIN System is a linked amateur radio repeater network based around the KA6WIN reflector, connecting operators across multiple nodes via IRLP and ALLStar technology. The site offers operating tips, member rosters, net schedules, FAQs on repeater use and antenna selection, and information on joining the network or becoming an affiliate.
http://twisterdata.com/
TwisterData.com is a meteorological data tool built in 2008 by storm chasers David Demko and Donald Giuliano, offering RAP, NAM, and GFS weather model forecasts with detailed atmospheric parameters like CAPE, hodographs, helicity, and sounding data. Designed with a clean, data-first philosophy, it pulls from NOAA datasets and is especially valuable for storm chasers, meteorologists, and serious weather enthusiasts who need raw model output without distractions.
http://iw5edi.com/ham-radio/818/ham-radio-2012?qsl-maker%2C63=
IW5EDI Simone is an Italian ham radio operator's comprehensive site covering antennas, software tools, technical articles, and operating guides for amateur radio enthusiasts. Visitors will find an impressive range of homebrew antenna projects, digital mode interfaces, amplifier repairs, and links to top amateur radio websites.