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/wb4hfn
WB4HFN is an amateur radio resource site covering antenna construction, digital communications, equipment modifications, and vintage R.L. Drake radio gear from the 1960s and 70s. The site also features a UHF repeater system on 443.200 MHz serving northern Massachusetts and southern New Hampshire, along with local weather data and ham radio club links.
http://ee.cleversoul.com/
The EE Compendium is a comprehensive reference hub for electronics engineers, students, and hobbyists covering microcontrollers, embedded systems programming, and hardware development tools. Visitors will find curated links and resources spanning popular platforms like Atmel AVR, Microchip PIC, Intel 8051, and Freescale chips, along with project kits, robotics, software compilers, and career resources.
https://nautiloid.net/fossils/sites/mazon/mazon.html
A firsthand account of fossil hunting at the Mazon Creek site in Illinois, one of the world's most celebrated locations for soft-body fauna preservation found inside concretions. The author shares photos, practical tips on finding nodules, and personal observations from multiple visits to this unique strip-mine-turned-wildlife-preserve.
http://selarc.org/
SELARC is the Southeast Louisiana Amateur Radio Club, serving the Hammond and Tangipahoa area with repeater listings, hamfest event info, ARES emergency communications resources, and monthly newsletters. The site covers everything from FCC licensing and packet radio to amateur radio satellites, making it a solid hub for local hams in the region.
https://4qdtec.com/
Created by Richard Torrens, founder of 4QD Ltd, this extensive archive covers a wide range of electronics circuits and design information, from audio and motor control to oscillators and power supplies. Built originally as a subscription club and now freely accessible, it emphasizes discrete component design for a solid grounding in fundamental electronic principles.
https://semarc.org/
SEMARC (South East Metro Amateur Radio Club) is a 501(c)(3) amateur radio club based in Cottage Grove, Minnesota, active since 1988 and affiliated with the ARRL. The site covers club meetings, volunteer examiner testing sessions, public service events, emergency communications, and membership information for ham radio enthusiasts in the Twin Cities metro area.
http://catawbasky.org/
The Catawba Valley Astronomy Club (CVAC) has been bringing amateur astronomy to North Carolina's Catawba Valley for 50 years, operating the Lucile Miller Observatory and hosting public stargazing events at parks, schools, and local venues. The site serves as the club's hub for event schedules, membership applications, officer listings, and clear sky charts for observers in the region.
http://sprg.ssl.berkeley.edu/shine/suntoday.html
Hosted at UC Berkeley's Space Sciences Laboratory, this page aggregates the latest solar images and interplanetary data from observatories and missions worldwide, including SOHO, STEREO, SDO, Big Bear, and Mauna Loa. Researchers and solar enthusiasts can browse visible light, H-alpha, extreme ultraviolet, X-ray, and magnetogram imagery alongside real-time solar wind and particle data from ACE and WIND spacecraft.
https://qsl.net/a/aa6j//radiomb
Created by AA6J Bill Jeffrey, an Assistant Scoutmaster and Merit Badge Counselor from San Diego, this site provides study notes and guidance to help Boy Scouts earn the Radio Merit Badge without needing a ham license or Morse code knowledge. It covers all eight requirements for the badge and includes links to additional resources, updated for the 2002 BSA requirements.
http://astrochemistry.eu/
Astrochemistry.eu, maintained by Guido W. Fuchs, serves as a collaborative hub for researchers in astrophysics and astrochemistry, covering observational, laboratory, and theoretical investigations of interstellar chemistry. Visitors can find featured news on prize-winning discoveries, upcoming conferences, job opportunities, and curated links to major databases, journals, and research networks worldwide.