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://ucares.org/
UCARES is the Utah County Amateur Radio Emergency Service, a volunteer group of licensed ham radio operators dedicated to providing emergency communications when conventional infrastructure fails. The site covers membership, nets, repeaters, certification, and public service events for hams in Utah County serving their community during disasters and emergencies.
https://admin.qsl.net/
QSL.net is a long-running free web hosting and email forwarding service built specifically for amateur radio operators worldwide, founded in 1996 by Alan Waller K3TKJ. Visitors can sign up for ham radio websites and email addresses, join mailing lists, access DXer resources, and connect with other operators through real-time DX spotting and chat services.
https://kvarc.org/
The Kaw Valley Amateur Radio Club (KVARC), callsign W0CET, has been serving amateur radio operators in Topeka, Kansas since 1926. The site provides club members and prospective hams with meeting schedules, repeater information, licensing education resources, newsletters, and event calendars.
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://afvl.li/
The Amateurfunk Verein Liechtenstein (AFVL) is the official amateur radio club of Liechtenstein, founded in 1986 and serving operators in the HBØ callsign region. The site covers club activities, DMR and FM repeaters, WinLink access, emergency communications, AREDN mesh networking, and upcoming events like POTA outings and monthly meetups.
https://journal.jcampbell.ca/
Jim Campbell (VE1KM) keeps this personal journal documenting his amateur radio adventures, including Parks on the Air activations, balun testing, 3D-printed ham radio accessories, and Morse Code operating tracked via the Reverse Beacon Network. Live feeds of his recent QRZ contacts, POTA stats, and Mastodon posts make this a genuinely active ham radio log worth bookmarking.
https://openphdguiding.org/phd2-log-viewer
PHD2 Guiding is the home of PHD2, a free and open-source autoguiding software used by astrophotographers to keep telescopes precisely locked on celestial targets. This page highlights a log file viewer tool developed by Andy Galasso, which helps users visualize guiding performance and diagnose tracking issues from their PHD2 guide logs.
https://mm4rk3t.neocities.org/
A minimalist personal page from a creator known as mm4rk3t, built around a Latin aphorism about stars being visible only at night and the sleepless nights that make mathematicians and astronomers. The sparse, cryptic aesthetic and classical quotation give the site an enigmatic, philosophical quality that hints at interests in astronomy and mathematics.
https://astunit.com/astunit_tutorial.php?topic=glossary
The Astronomical Unit is a comprehensive astronomy tutorial site covering everything from choosing a first telescope to positional astronomy, stellar evolution, and debunking pseudoastronomy claims. Visitors will find practical guides, a detailed glossary, book recommendations, DIY telescope projects, and rigorous critiques of popular astronomical myths like the '2012 nonsense' and Apollo conspiracy theories.
http://nd6t.com/
ND6T's site is a hands-on collection of simple amateur radio projects covering antennas, BITX transceivers, Microchip PIC gadgets, and test equipment tips. It's a practical resource for ham radio hobbyists looking for accessible DIY electronics builds with real-world workbench guidance.