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://qrz.com/cgi-bin/webcall
QRZ.com is the premier ham radio callsign lookup database, allowing operators to search for licensed amateur radio users by callsign, name, address, grid square, or county. Beyond the core database, the site offers logbooks, DX spotting, forums, exam practice, license renewals, and a bustling swap meet for ham radio gear.
https://www.qsl.net/g4prs
The Poole Radio Society (G4PRS) is a UK-based amateur radio club representing enthusiasts in the Poole area, hosted on the QSL.net network. The site serves as the club's online presence, likely featuring member information, club activities, and resources for local ham radio operators.
https://www.qsl.net/by2hit
The official web presence of the BY2HIT Amateur Radio Club at Harbin Institute of Technology in Harbin, China, reachable via the QSL.net callsign network. The site provides QSL card mailing information and serves as a landing page for this university-based ham radio club.
https://www.qsl.net/dl5dbm/HAM/hbrew.htm
DL5DBM's homebrew page is a technical treasure trove for amateur radio operators, featuring detailed documentation for self-built projects including a 1 KW 2-meter power amplifier, antenna preamps, transverters, baluns, and regulated power supplies. Projects span VHF, UHF, and 6-meter bands with downloadable schematics and guides in both English and German, making it a practical resource for hams who build their own equipment.
https://qsl.net/w6ddx
The High Desert DX Association (HIDEXA) is an amateur radio club based in the High Mojave Desert of California, dedicated to DX (long-distance) radio communication. This page is a redirect notice pointing visitors to the club's new callsign and website location at W6EFB.
http://fbdd-lit.blogspot.com/
Molecular Design is a scientific blog exploring the manipulation of molecular properties to control the behavior of compounds and materials, written by contributors including Mel Peter Kenny. Posts blend technical drug discovery topics like Hit to Lead optimization with personal observations from Trinidad and the UK, giving the site a distinctive voice that mixes rigorous science with vivid storytelling.
http://sffma.net/
The South Florida FM Association (SFFMA) is a Miami-area amateur radio club operating multiple repeaters across the region, with real-time emergency status information and a live audio feed of their 147.000 MHz repeater. The site includes repeater listings, meeting schedules at the Miami-Dade EOC, member resources, and photo galleries of their tower and equipment installations.
https://w8lap.com/
The Lapeer County Amateur Radio Association (W8LAP) has served Lapeer County, Michigan since its founding in 1953, bringing together nearly 60 members for community service, emergency communications, and amateur radio operations. The site covers the club's repeater systems, ARES emergency services, SkyWarn weather spotting, membership info, newsletters, and licensing exam events.
https://aarc.tripod.com/
The Alger Amateur Radio Club is a Michigan-based ham radio organization serving Alger County, with ties to the ARRL and a focus on emergency communications. The site is a simple club homepage from 2002, offering a contact point for local ham radio enthusiasts interested in radio emergency services.
http://astrosurf.com/cidadao
António Cidadão's dedicated astronomy site showcases years of lunar and planetary observation from Carcavelos, Portugal, featuring CCD imaging of the Moon, Mars, Jupiter, and Saturn captured with a 14-inch SCT telescope. The site includes detailed imaging guides covering super-resolution techniques, tri-colour imaging, limb darkening correction, time-lapse animations, and a Moon-Light Atlas reference, making it a rich resource for amateur planetary imagers.