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://n8ara.org/
The Newark Amateur Radio Association (N8ARA) serves ham radio enthusiasts in central Ohio, providing a community hub for licensed operators in the Newark area. Visitors can learn about club membership, meetings, and local amateur radio activities in the region.
http://ned.ipac.caltech.edu/help/cosmology_calc.html
Hosted by NASA's Extragalactic Database (NED) at Caltech, this curated page collects links to online cosmology calculators contributed by researchers at UCLA, University of Colorado, and other institutions. Visitors can compute distances, lookback times, Hubble parameters, K-corrections, and other key cosmological quantities by entering values like redshift, Hubble constant, and Omega parameters.
https://cryothene.neocities.org/
Cryothene is a technically-minded personal blog covering electronics projects, embedded systems, reverse engineering, and 3D printing, with standout documentation of a custom display driver project called Sharpie spanning many installments. The site also mixes in anime opinions, game reviews, and occasional recipes, but the dominant draw is its detailed hardware and microcontroller writeups.
http://srgclub.org/
Karl Shoemaker (AK2O) runs this ham radio resource dedicated to the SRG Club's 147.20 MHz repeater network covering Eastern Washington and Northern Idaho, with linking to Seattle. The site dives into technical repeater building topics including flat audio, operational amplifiers, PCB work, receiver audio boards, and repeater controllers.
http://rivastro.org/index.php
The Riverside Astronomical Society (RAS) has been serving Southern California astronomy enthusiasts since 1957, offering star parties, public outreach, monthly meetings with professional astronomers, and access to their dark sky site GMARS in Landers, CA. The site features event calendars, member resources, sky cameras, weather data, and information about their annual Nightfall star party event.
https://yb0ah.tripod.com/
H.K. Ardiwinata (YB0AH) built this Indonesian amateur radio resource covering homebrew electronics, circuit diagrams, and equipment manuals collected from personal experience and other ham radio sites. It features sections on basic electronics, ham equipment manuals, and electronics circuit diagrams, making it a useful reference for Indonesian ham radio enthusiasts.
https://atmos.uw.edu/marka/wa.normals.html
Hosted on the University of Washington's atmospheric sciences domain, this page presents observed climate normals for Washington State covering the 1971-2000 period. Visitors can click on map markers to retrieve mean monthly precipitation, daily maximum temperature, and daily minimum temperature data for locations across the state.
http://stormchaser.ca/Stormchaser.html
George Kourounis is a globe-trotting storm chaser, explorer, and TV presenter whose site showcases breathtaking photographs and videos of tornadoes, hurricanes, volcanoes, lightning, and other extreme natural phenomena from all 7 continents. Best known for hosting the 'Angry Planet' TV series broadcast in over 100 countries, his online home is a stunning archive of close encounters with Earth's most violent forces.
http://cordell.org/
Cordell Expeditions is a site dedicated to exploration and expedition activities, likely covering adventures, field research, or scientific trips into the natural world. The name and framing suggest a group or initiative organized around outdoor discovery and expedition-based work.
https://hamfest.org/
The Huntsville Hamfest is one of the longest-running amateur radio events in the United States, held annually since 1954 at the Von Braun Center in Huntsville, Alabama. In 2026 it will host the ARRL National Convention, featuring a dealer show, flea market, forums, licensing opportunities, and activities for the whole family.