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://johnshepler.com/articles/piday.html
John Shepler's engaging article celebrates Pi Day and explores the fascinating history of the transcendental number pi, from ancient scholars to modern supercomputers crunching billions of decimal places. Packed with fun facts, literary references, and links to birthday calculators and playlists, it makes mathematics genuinely entertaining for casual readers and math enthusiasts alike.
https://www.radioing.com/
Radioing.com, created by Charlie Bautsch (W5AM), is a sprawling amateur radio network covering everything from licensing guides and RF calculators to virtual museums of classic Collins Radio equipment and vintage transceivers. With over 4,000 ham radio links, callsign search tools, Morse code resources, classified ads, and a remote station, this site is a comprehensive hub for both newcomers and seasoned hams.
https://abuseofnotation.github.io/
Abuse of Notation is a thoughtful blog by a writer who weaves together mathematics, logic, philosophy, and programming into long-form essays and books, covering topics from category theory to Kant to functional programming. The site also features several self-authored books, including 'Category Theory Illustrated,' making it a surprisingly deep resource for readers who enjoy rigorous yet personal intellectual exploration.
https://wb4aej.com/hamdomain
WB4AEJ's Ham Domain is a comprehensive amateur radio resource built around a massive directory of ham radio operator websites, organized by callsign. Beyond the directory, the site covers special events stations, callsign lookups, fox tone sequences, and links to major organizations like ARRL, AMSAT, and TAPR.
https://www.qsl.net/la5ki/org.htm
LA5KI hosts an extensive photo archive of vintage ham radio equipment, organized by manufacturer and spanning dozens of classic brands like Collins, Hallicrafters, Heathkit, and Hammarlund. With over 60 images catalogued across rare and iconic mid-century radio manufacturers, this site is a visual treasure trove for vintage radio collectors and enthusiasts.
http://g3pho.free-online.co.uk/microwaves
A hobbyist site dedicated to microwave frequencies above 1000MHz, inviting visitors to explore the upper reaches of the amateur radio spectrum. The site is part of the Amateur Radio World Ring webring, connecting enthusiasts focused on microwave and UHF/SHF band experimentation.
https://qsl.net/wa2lqo
The Grumman Amateur Radio Club (WA2LQO) is a Long Island, New York club site covering repeater status, special event stations, VE testing sessions, and club newsletters. Highlights include historical photos from lighthouse operations aboard the Nantucket Lightship and decades of club social gatherings dating back to the early 2000s.
https://johnefarley.com/wx.htm
John E. Farley has been chasing and documenting severe weather across the Midwest, Plains, and West since 1996, with detailed field reports spanning nearly three decades. The site features storm observation logs organized by year, photo galleries of tornadoes, supercells, lightning, and other phenomena, plus a thoughtful essay on safe storm chasing practices.
https://tigertronics.com/
Tigertronics is the home of the SignaLink and BayPac series of sound card radio interfaces, offering products and resources for amateur radio digital mode operation. The site serves ham radio operators looking to connect their radios to computers for modes like packet, PSK31, and other digital communications.
https://asnsw.com/
The Astronomical Society of NSW (ASNSW) is a membership-based club for amateur and professional astronomers in New South Wales, Australia, offering meetings, star parties, astroimaging groups, and access to a dedicated dark-sky observing site called Wiruna near Ilford. Members enjoy a monthly journal called UNIVERSE, public outreach events, online learning resources, and coverage of upcoming celestial events including the Total Solar Eclipse of 2028.