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://empslocal.ex.ac.uk/people/staff/mrwatkin
Matthew R. Watkins is a mathematician and honorary researcher at Exeter University whose site centers on his celebrated 'Secrets of Creation' trilogy, making analytic number theory and prime numbers accessible to general audiences. The site also features a number theory and physics archive, prime number resources for beginners, and links to his eclectic range of interests including parapsychology, the I Ching, and psychogeography.
https://spacearchive.info/
Space Archive, maintained by Brian Webb since 2000, is a comprehensive regional resource covering space and astronomy for the American Southwest, with a particular focus on Vandenberg Space Force Base rocket and missile launches including schedules, viewing guides, launch history, and multimedia. The site also features astrophotography tips, suburban astronomy guides, dark sky sites, and over two decades of archived space and astronomy news.
https://seabean.com/what.asp
Seabean.com is a dedicated reference site exploring the fascinating world of sea-beans and drift seeds, those tropical seeds and fruits that travel ocean currents for thousands of miles before washing ashore. Visitors can learn how sea-beans float, where they originate, and how to identify specific species like Tropical Almond and Hog Plum.
https://tropicalweather.net/
Tropicalweather.net is a comprehensive resource covering tropical cyclones, hurricane forecasts, and preparedness tips, with special focus on the North Atlantic basin and nearly two decades of historical hurricane summaries. Visitors can test their knowledge with trivia quizzes at three difficulty levels, browse climatology data for Caribbean cruise destinations, and even explore career paths in TV meteorology.
https://www.qsl.net/gara
GARA (Greater Area Radio Association) hosted its club site on QSL.net, featuring repeater listings, member rosters, and information about joining the group. The file index reveals pages covering multiple frequency bands (50, 144, 222, and 440 MHz) along with affiliations with ARES, RACES, SKYWARN, and ham radio webrings typical of late-1990s amateur radio club sites.
https://radiomasterlist.com/en/index.html
RadioMasterList.com is a comprehensive reference directory cataloging specifications, performance data, and prices for hundreds of amateur radio transceivers, professional receivers, SDRs, and vintage radios from brands like Yaesu, ICOM, Kenwood, and more. Whether you're comparing HF transceivers or hunting down specs on a classic 1970s shortwave receiver, this site serves as a go-to database for radio enthusiasts and serious operators alike.
https://julianbunn.org/
Julian Bunn is a computational scientist at Caltech with a background in particle physics at CERN, DESY, and the Rutherford Appleton Laboratory, now working on seismology and earthquake early warning systems like ShakeAlert. His sprawling homepage serves as a personal aide-memoire covering decades of scientific work, publications, ham radio, genetic algorithms, and even obscure retro computing projects from the DECUS era.
https://ptri1.tripod.com/
A detailed educational resource dedicated entirely to Pascal's Triangle, covering its construction, history, and the surprising number of patterns hidden within it. Visitors can explore topics ranging from the Fibonacci sequence and Sierpinski fractals to prime numbers and polygonal numbers, with downloadable programs to generate and visualize the triangle's patterns.
https://astro.uni-bonn.de/~pbrosche/astoria.html
Hosted at the University of Bonn's Argelander Institute for Astronomy, this long-running site by Wolfgang R. Dick serves as a curated hub for the history of astronomy, linking to resources on history of science, notable events like the Simon Marius symposium, and the Working Group for the History of Astronomy. Created in 1995 and maintained for decades, it bridges academic astronomy with historical scholarship in both English and German.
https://ik3qar.it/rtty/1
IK3QAR's technical page covers RTTY digital radio operation, focusing on FSK and AFSK interface circuits with detailed wiring diagrams for connecting a PC soundcard to a transceiver. The site addresses practical problems like ground loop interference and signal reentry, offering schematics and tips for rigs including the Kenwood TS940.