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://fourmilab.ch/
Fourmilab is John Walker's legendary personal science and technology site, home to a vast collection of interactive tools, essays, and experiments spanning astronomy, physics, computing, and more. Notable features include real-time Earth and Moon viewers, historical documents, and decades of original technical writing that have made it a classic destination on the web.
http://k6may.com/
The personal ham radio page of K6MAY, a licensed amateur radio operator whose callsign is registered on QRZ.com, featuring a live UTC clock display and imagery related to Collins radio equipment, railroads, biking, and modeling. The site blends the operator's ham radio identity with glimpses of other hobbies, making it a classic old-web shack page from the amateur radio community.
https://jedaler.tripod.com/elec.html
Jedaler's Electronics Page, built by JaKab-Daniel, is a curated link collection focused on circuit schematics, microcontrollers, RF antennas, robotics, and hobby electronics projects. Visitors will find references to PIC microcontroller resources, Tesla-related circuits, xenon flash designs, and free energy machine plans alongside general electronics archives.
https://www.aosny.org/AOSLinksIndex.htm
The Amateur Observers' Society of New York maintains this comprehensive links directory covering astronomical magazines, podcasts, space agencies, comet and meteor shower resources, astronomy apps, dealers, and member websites. A well-organized gateway for amateur astronomers in the New York area, the page also highlights member-exclusive discounts on publications like Sky and Telescope and Astronomy Magazine.
https://thin-man.com/fog
Cloaked in Mystery is a fanlisting dedicated to fog, celebrating fans of this atmospheric weather phenomenon from 16 countries around the world. Listed with The Fanlistings Network, visitors can join, browse member codes, and declare their appreciation for one of nature's most mysterious natural occurrences.
https://cqrlog.com/
CQRLOG is a feature-rich ham radio logging application for Linux, built on a MySQL database and supporting over 140 radio types via hamlib integration. The site serves as the official home for the software, offering downloads, user forums, DX cluster support documentation, and updates from the development team.
https://astrosystems.biz/
AstroSystems is a Colorado-based manufacturer selling telescope kits, accessories, and components including their signature TeleKit truss tube Dobsonians, secondary mirrors, laser collimators, and digital setting circles. With worldwide shipping and a broad catalog spanning fast f/ratio optics to dew removal systems, this site is a go-to resource for amateur telescope makers and Dobsonian enthusiasts.
http://k0bg.com/
K0BG is a comprehensive amateur radio resource run by Alan Applegate, focusing heavily on mobile ham radio installations, antenna theory, and RF bonding techniques. The site is packed with detailed technical articles, diagrams, and practical guidance that make it a go-to reference for hams interested in operating from vehicles.
http://amurbirding.blogspot.com/
The Amur Bird Project documents bird research and conservation efforts in Russia's Amur region and Siberia, with detailed field reports on catching, tagging, and tracking species like Bluethroats with geolocators. Run by a team of researchers including Wieland Heim and collaborators, it offers a rare window into ornithological fieldwork in some of the world's most remote wetland habitats.
https://www.qsl.net/dearg
The Driven Elements Amateur Radio Group (DEARG) is a Northeast Arkansas ham radio club operating under call sign KD5PXG, focused on 6 and 2 meter single sideband operation on 144.220 USB. The site serves as the club's web presence with sections for membership info, archives, and Sporadic E propagation news.