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://aaroncake.net/circuits/index.asp
Aaron Cake's extensive collection of electronic circuit schematics covers categories from power supplies and light/laser projects to telephone circuits and sound/radio designs. Each circuit includes printable PCB patterns, community rankings, and user comments, making it a hands-on resource for hobbyist electronics builders.
https://astrorx.org/
The Astronomical Society of the Desert (ASOD) is an amateur astronomy club with resources for beginners, star party schedules, observing site information, and membership details. Maintained by Bruce G, this old-web club homepage offers a glimpse into organized community stargazing in a desert region ideal for clear-sky observing.
https://crawford.tardigrade.net/journal/index.html
Rod Crawford's Spider Collector's Journal chronicles decades of arachnid collecting expeditions from 1986 through the present, including trips to the Russian Kuril Islands and Sakhalin Island. The site features year-by-year narrative accounts, photo albums, and detailed documentation of tools and techniques used in scientific spider collection.
https://www.qsl.net/w1aa/w1aa_1001.htm
Documenting the 2003 Marconi 100th Anniversary Special Event station operated by the Marconi Radio Club (W1AA) and the Marconi Cape Cod Memorial Radio Club (KM1CC) near the historic Cape Cod transmission site, this site captures a milestone commemoration that logged over 13,000 contacts worldwide. Highlights include a rare contact with the International Space Station and a presidential commemorative message from George W. Bush, making it a fascinating record of amateur radio history in action.
http://rcra.wagnera.com/
The Red Cedar Repeater Association (RCRA) is a Wisconsin-based amateur radio club established in 1974, serving as trustee for the K9KGB repeater system covering West Central Wisconsin along the I-94 corridor. The site provides technical details on their 2-meter repeater frequencies, PL tones, and remote links, along with embedded National Weather Service radar tools useful for local operators.
http://oltw.blogspot.com/
Rachel Sussman's project documenting the oldest living organisms on Earth, from ancient chestnut trees to Siberian actinobacteria, combines scientific curiosity with fine art photography. Each post chronicles her travels to find and photograph these extraordinary subjects, paired with reflections on deep time, survival, and the nature of life itself.
https://uh.edu/~jclarage/astr3131/lectures/4/einstein/Einstein_stanford_Page7.html
A lecture page from a University of Houston astronomy course (ASTR 3131) explaining Einstein's theory of general relativity and the concept of curved spacetime. It covers how mass and energy deform the fabric of spacetime, using accessible analogies like a ball on a bedsheet to illustrate four-dimensional curvature.
https://norwichastro.org.uk/useful-links
The Norwich Astronomical Society maintains this curated links page pointing visitors to national bodies, local clubs, observatories, and online resources for amateur astronomers in the UK. Based at Seething Observatory in Norfolk, the society offers a well-organized gateway to stargazing locations, observing programmes, and space science topics including meteorites and solar sails.
https://keeneastronomy.org/
The Keene Amateur Astronomers (KAA) is a New Hampshire astronomy club established in 1957, offering members access to an observatory, star parties, observing events, telescope training, and a member photo gallery featuring stunning shots of comets, auroras, and the Milky Way. The club also highlights community achievements like member Susan Rolke's selection for NASA and ACEAP ambassador programs, making it a rich hub for both beginner and experienced stargazers in the Cheshire County region.
https://hepdata.net/
HEPData is an open repository for publication-related High-Energy Physics data, hosting experimental datasets from major LHC collaborations including ATLAS, ALICE, CMS, and LHCb. Researchers can search and submit data using advanced query syntax, making it an essential reference tool for particle physics scientists worldwide.