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://math.columbia.edu/~woit/wordpress?p=15620
Peter Woit's 'Not Even Wrong' is a long-running physics blog hosted at Columbia University, covering cutting-edge topics in theoretical physics including twistor theory, quantum field theory, and the mathematics of unification. Woit writes with deep technical expertise and a critical perspective, making this a destination for mathematically sophisticated readers interested in the foundations of modern physics.
https://ei5di.com/
Paul O'Kane EI5DI offers SD, a free and actively maintained contest logging software for amateur radio operators running on Windows and Linux. The site also features Paul's personal commentary on ham radio topics, DXpedition stories, and resources like DXCC country files and Super Check Partial databases.
https://ptable.com/
Ptable is a richly interactive periodic table created by Michael Dayah, offering property trend visualization, 3D orbital diagrams, isotope data, and compound mixing tools for all 118 elements. Available in dozens of languages and regularly updated, it serves as a go-to reference for students, educators, and chemistry enthusiasts alike.
https://cbastro.org/
The Center for Backyard Astrophysics (CBA) is a global citizen-science network of amateur astronomers using small telescopes to conduct photometric studies of cataclysmic variable stars. The site hosts science results, publications, data submission guidelines, observer resources, and a worldwide station map connecting contributors from Belgium to Indiana.
https://m0rvb.uk/
The personal landing page for M0RVB, a licensed amateur radio operator whose callsign spells out Mike Zero Romeo Victor Bravo. The site links out to his radio blog, a KiwiSDR receiver, and his presence on mastodon.radio, making it a hub for his ham radio online activity.
http://dfma.org/
The Durham FM Association (DFMA) is an amateur radio club based in Durham, North Carolina, serving members across the Research Triangle Area with repeaters, monthly meetings, and public service activities. The site covers club events, repeater information, newsletters, ARES/AUXCOMM support, and Field Day activities, making it a central hub for local ham radio enthusiasts.
http://qth.com/w0aih
The W0AIH Contest Station site documents an impressive amateur radio operation spread across 120 acres of Wisconsin farmland, featuring over 50 towers and six HF operating positions. Built as a tribute to Paul Bittner W0AIH (1933-2018), the site covers the station's hardware, operators, antennas, and the storied history of 'The Farm' that became a landmark visible from Interstate 94.
https://marc-hq.org/
The Motorcycling Amateur Radio Club (MARC) is a community group that combines motorcycle riding with ham radio operation to support charity fundraising events like Bike MS rides in Southern California. The site includes a tech center, photo gallery, newsletters, event calendar, and membership information for riders and operators who want to combine their passions while giving back.
http://uksmg.org/content/deadband.htm
Written by Palle Preben-Hansen (OZ1RH), this technical article explains how radio amateurs can make long-distance contacts on the 50MHz (Six Meter) band by exploiting meteor scatter propagation even when the band appears dead. It covers meteor trail geometry, shower timing, diurnal and seasonal meteor rate variations, and practical operating techniques, with supporting figures and links to software and IARU procedures.
http://sacmarc.org/
SACMARC is an amateur radio club based in Bellevue, Nebraska, operating under the callsigns K0AIR and K0GRL. The site serves as the online presence for this local ham radio organization, with a history spanning from 1997 to 2022.