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/oe7cwj
Christian Wieser's amateur radio page, hosted on QSL.net under the callsign OE7CWJ, appears to be a minimal personal station page that redirects visitors to a new site at qsl.net/oe3cwj. The QSL.net domain and Austrian callsign prefix make clear this belongs to a licensed ham radio operator from the OE (Austria) region.
https://umbra.nascom.nasa.gov/eclipse/980226/text/filter-sources.html
Part of NASA Reference Publication 1383, this page provides a curated list of U.S. vendors selling mylar and glass solar filters safe for eclipse and solar viewing with or without a telescope. It includes contact details for well-known optics companies like Celestron, Meade, and Orion, making it a practical companion resource for amateur astronomers preparing for solar observation.
https://botanical.com/botanical/mgmh/mgmh.html
A hypertext edition of Mrs. M. Grieve's landmark 1931 reference work 'A Modern Herbal,' covering medicinal, culinary, cosmetic, and economic properties of over 800 herbs and plants. The site includes alphabetical plant indexes, a recipes index, a poisons index, and supplementary reference tools like conversion tables and a medical dictionary.
http://drseti.com/
The personal website of Dr. H. Paul Shuch, N6TX, an aerospace engineer and educator best known as 'Dr. SETI' for his work in the Search for Extra-Terrestrial Intelligence. Beyond SETI and radio astronomy, the site weaves together his interests in amateur radio, EME (Earth-Moon-Earth) communication, folk and filk music, poetry, and Vietnam veteran experiences.
http://webmineral.com/danaclass.shtml
Webmineral presents a comprehensive classification of mineral species based on Dana's New Mineralogy, organizing over 78 mineral classes from Native Elements to Unclassified Silicates. This detailed reference resource covers the full spectrum of mineralogy including sulfides, oxides, halides, carbonates, and silicates, making it an invaluable tool for geologists, mineralogists, and earth science enthusiasts.
https://tarc.org/
The Temple Amateur Radio Club (TARC), operating under call sign W5LM, serves amateur radio enthusiasts in Temple, Texas with monthly meetings, weekly nets, license classes, and emergency communications training. The site also hosts information about HamExpo, a regional hamfest and vendor expo, along with an extensive archive of monthly club newsletters dating back several years.
http://www.zerobeat.net/
ZeroBeat.net is a hub for radio communications enthusiasts, featuring technical articles, historical items, and resources covering amateur radio topics like CW telegraphy, QRP low-power operation, and R.L. Drake equipment. Visitors will find links to antenna handbooks, online licensing exams, Morse code resources, and submarine radio operations, making it a handy reference for hams of all experience levels.
https://radio-astronomy.org/
The Society of Amateur Radio Astronomers (SARA) is a membership organization dedicated to the practice and promotion of radio astronomy among hobbyists, students, and educators. The site offers a wealth of resources including a peer-reviewed journal, educational guides for getting started, student grant programs, project sections, and details about annual conferences held across the United States.
https://openrepeater.com/
The OpenRepeater Project is an open-source initiative to build a low-cost, Linux-based amateur radio repeater controller using single-board computers like the Raspberry Pi. Managed by N3MBH, the site offers downloads, a knowledge base, setup guides, and community forums for ham radio operators looking to build their own duplex repeater systems.
http://pupfish.net/dsac
The Desert Springs Action Committee (DSAC) is a volunteer group dedicated to hands-on aquatic conservation and education, focusing on desert fish habitats in Ash Meadows National Wildlife Refuge, Death Valley National Park, and Devils Hole. The site also features TKphotos digital image collections covering desert springs, aquarium fish, and regional wildlife.