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://ac6v.com/
AC6V's Amateur Radio and DX Reference Guide is a massive archive built by Rod Dinkins (AC6V) covering 700 amateur radio topics across 133 pages and over 6,000 links. From antenna homebrew projects and propagation guides to licensing help and contest pages, this long-running site has been an essential reference for ham radio operators since 1997.
https://masatern.tripod.com/
KB1GLF's unofficial web presence for the Massachusetts chapter of the Salvation Army Team Emergency Radio Network (SATERN), a group of licensed amateur radio operators who provide emergency communications support during disasters. The site includes member lists, training resources, a calendar, event photos, and information about the weekly Friday night net on 145.23 MHz.
https://xeno-canto.org/
Xeno-canto is a massive community-driven database of wildlife sound recordings from around the world, covering birds, frogs, mammals, bats, and more, browsable by region or taxonomy. Launched in 2005, it serves researchers, birders, and curious listeners alike with tens of thousands of freely downloadable recordings backed by an open API and active community forum.
http://robgendlerastropics.com/
Robert Gendler's astrophotography site showcases a stunning image gallery of astronomical objects alongside essays on 140 popular celestial subjects and a beginner's astronomy primer. The site also features technical articles on advanced imaging techniques like hydrogen alpha color imaging and Photoshop mosaics, plus information about Gendler's published books on astronomy.
http://astroa.physics.metu.edu.tr/bigeyes.html
A comprehensive reference table listing the world's largest optical telescopes, compiled by Bill Arnett and hosted at Middle East Technical University's physics department. Each entry includes the telescope's aperture, name, geographic coordinates, altitude, and technical notes, making it a handy quick-reference for astronomy enthusiasts and researchers.
https://www.qsl.net/cwra
The Central Wisconsin Repeater Association (CWRA) is a ham radio club based in the Madison/Baraboo area that owns and operates two 2-meter FM repeaters serving southern Wisconsin. Founded over 35 years ago, the site offers membership information, newsletters, board of directors details, and resources like FCC license renewal links, with a notable emphasis on public safety and storm watch coordination.
https://www.popularastronomyclub.org/astronomy-links
The Popular Astronomy Club's curated links page connects visitors to a rich collection of astronomy resources, from NASA and Sky & Telescope to local observing groups like the Quad Cities Astronomical Society and Niabi Zoo monthly stargazing events. A helpful hub for amateur astronomers in the Midwest, it gathers tools for sky charts, ISS pass predictions, lunar atlases, dark sky advocacy, and more.
http://wildlifer.com/wildlifesites/index.html
Bill Standley's curated directory of internet resources for wildlife ecologists, organized into categories covering federal and state organizations, professional and non-profit groups, universities, and taxa such as mammals, birds, amphibians, and reptiles. The site also indexes resources for endangered species, fisheries, aquatic ecology, jobs, and wildlife-related products like telemetry equipment and optics.
https://content.lib.washington.edu/salmonweb
Curated by the University of Washington Libraries Special Collections Division, this digital archive spans 1890 to 1961 and brings together photographs, documents, and original materials tracing the history of salmon fishing and the roots of the Pacific Northwest salmon crisis. Visitors can browse topics ranging from Native American fishing practices and salmon canneries to hatcheries and the Columbia River salmon industry.
https://theastronomer.tripod.com/
Tammy Plotner's astronomy site is a sprawling personal observatory journal covering years of nightly observing reports, constellation starhop guides, solar and lunar photography, aurora sightings, and deep sky sketches. With content spanning from 2001 to 2007 and sections on Messier studies, planetary transits, and star parties across Ohio and beyond, this is a genuine labor of love for backyard astronomers.