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://sera.org/
SERA, the Southeastern Repeater Association, is the largest amateur radio repeater coordinating organization in the United States, serving ham radio operators across Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, and West Virginia. The site provides frequency coordination resources, band plans across multiple frequency ranges, a coordinated repeater database, and membership information for licensed amateur radio operators in the Southeast.
http://users.marktwain.net/aschmitz/home.html
KB0YKI's Radio Zone is Aaron Schmitz's amateur radio resource featuring antenna building hints, gamma match plans, repeater building guides, and online tools like a Yagi designer and J-Pole designer. The site also includes a QSL card maker, regional scanner frequencies, and a repeater map, making it a handy reference for ham radio hobbyists.
https://scottaaronson.blog/
Shtetl-Optimized is the long-running blog of Scott Aaronson, a theoretical computer scientist and quantum computing researcher, where he dives deep into complexity theory, quantum computing misconceptions, AI, and education policy. Known for its intellectual rigor and wit, it attracts readers from academia and beyond who enjoy substantive takes on math, physics, and the occasional culture-war skirmish in gifted education.
https://valleystargazers.com/
The Shenandoah Valley Stargazers (SVS) is an amateur astronomy club based in the Staunton, Waynesboro, and Harrisonburg, Virginia area, offering observing events, astrophotography, education, and community outreach. The club operates its own observatory in Stokesville, VA and welcomes families, groups, and the public to explore the night sky together.
https://www.qsl.net/fara
The Framingham Amateur Radio Association (FARA) ran this club hub for ham radio operators in the Framingham, Massachusetts area, featuring meeting schedules, flea market announcements, licensing events, and DX-pedition photos. A great snapshot of an active local amateur radio club from the early 2000s, complete with member callsigns, ARRL news feeds, and resources for newcomers seeking their first no-code license.
https://astronomyonline.org/
Built by a legally blind photographer and astronomer, Astronomy Online is a comprehensive resource covering topics from astrophotography and the solar system to cosmology, astrobiology, and exoplanets. The site includes observation guides, a worksheet library for teachers, software recommendations, and an image gallery, making it a remarkable contribution from someone who created it despite a significant physical disability.
https://www.qsl.net/kg4dwj
The Florida Trackers Society is an amateur radio club based in Florida dedicated to ARDF (Amateur Radio Direction Finding), foxhunting competitions, and Skywarn storm tracking in coordination with the National Weather Service. Founded in 1999 under the callsign KG4DWJ, the site covers club membership, foxhunt rules, Doppler weather tracking vehicles, and upcoming events for ham radio enthusiasts across the state.
https://mysterium.com/extinction.html
Created by David Ulansey, this long-running reference site compiles hundreds of links to authoritative scientific reports documenting the ongoing sixth mass extinction and global biodiversity crisis. Active since 1998 and last updated in 2021, it covers species loss across vertebrates, insects, plants, and freshwater animals, drawing on sources like the IUCN, UN, WWF, and major scientific journals.
https://itis.gov/
ITIS is the official Integrated Taxonomic Information System, a partnership between U.S. federal agencies and global specialists providing authoritative scientific names and taxonomic classifications for plants, animals, fungi, and microbes worldwide. Researchers and biodiversity professionals can search by common name, scientific name, or TSN identifier, access hierarchical taxonomic reports, and download the full database for integration into their own projects.
https://amlogbook.com/
AMLOGBOOK appears to be an online amateur radio logbook service, offering operators a way to record and manage their contacts digitally. The site prompts users to renew their subscription, suggesting it provides ongoing logging tools for ham radio enthusiasts.