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://jmol.sourceforge.net/
Jmol is a free, open-source Java application and HTML5 tool for visualizing chemical structures in interactive 3D, supporting molecules, crystals, biomolecules, and materials. The project offers downloadable binaries, extensive scripting documentation, demos, and a community mailing list, making it a go-to resource for chemistry education and research.
https://qsl.net/5b4es
The English School Radio Club (callsign 5B4ES) is a school-based amateur radio club founded in 1969 in Cyprus, covering contesting, licensing exams, and hands-on operator training for new members. The site offers history, exam notes, channel statistics, a photo library, and news about club events, making it a genuine hub for young ham radio enthusiasts.
https://k7su.com/
Kelly Klaas (K7SU) runs this personal hub covering amateur radio, handmade Morse code keys, woodworking, laser engraving, and voice-over work. The site serves as a launchpad to several distinct projects, with the handmade keys and ham radio content being the clear centerpiece.
https://uksmg.org/landing.php
The UK Six Metre Group is a dedicated amateur radio organization promoting activity on the 50MHz band, with resources covering DX spotting, propagation tools, contests, awards, and licensing guidance. It features real-time DX maps, standings tables, solar weather links, and a membership program, making it a comprehensive hub for Six Metre enthusiasts worldwide.
http://insti.physics.sunysb.edu/physics/physics_links.htm
Maintained by Stony Brook University's physics department, this extensive link directory covers physics preprints, online journals, conferences, jobs, data sources, and institutions. Researchers and students will find hundreds of curated links spanning Physical Review, arXiv, SLAC SPIRES, astrophysics journals, and community resources like Fermilab and the Nobel Foundation.
https://kb9ocq.tripod.com/CW
A reference page by KB9OCQ dedicated to Morse code (CW) abbreviations and Q-signals used in amateur radio communication. It covers everything from common shorthand like TU and B4 to a full table of Q-codes with their question and statement meanings, making it a handy quick-reference for ham radio operators.
https://irlp.net/
The official home of the Internet Radio Linking Project (IRLP), a system that connects amateur radio repeaters around the world using Voice over IP technology. The site provides information, maps, node codes, frequencies, and technical details for ham radio operators looking to link into the IRLP network.
https://www.shreveportastronomy.com/
The official website of the Shreveport-Bossier Astronomical Society, a non-profit astronomy club active in Louisiana since 1959, offering free public observing nights, access to the historic Shreveport Observatory, and resources covering astrophotography, variable star observation, and more. Visitors can find meeting schedules, membership info, observing certificates, and a curated list of astronomy links ranging from NASA to Sky and Telescope Magazine.
https://n3wnb.tripod.com/
Tim Ingram (N3WNB) of Corry, PA built this ham radio page featuring a callsign lookup tool and a curated collection of links to resources like the ARRL, QRZ, and equipment suppliers. The site also highlights his Yaesu FT-847 rig and includes a local hams email list, giving it a personal community flavor alongside the standard reference links.
https://www.qsl.net/vk3te/Packet.html
Peter Brennan (VK3TE) runs this page dedicated to his packet radio BBS operations in Victoria, Australia, where he serves as sysop for multiple nodes including VK3TE and VK3SPB, connecting to an extensive international packet network. The site details his RF feeds to Melbourne-area BBS stations, AXIP/AXUDP partnerships spanning Australia, New Zealand, Europe, and North America, and offers telnet access for users wanting to join the network.