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://www2.mmm.ucar.edu/projects/ncar_ensemble/legacy
Hosted by NCAR's Mesoscale and Microscale Meteorology Laboratory, this site provides real-time ensemble weather forecast products including surface conditions, precipitation probabilities, upper-air fields, and severe weather outlooks across multiple domains. Researchers and forecasters will find a rich array of ensemble visualization tools including postage stamp maps, plumes, soundings, reflectivity paintballs, and neighborhood probability products.
https://k8vsy.radio/
K8VSY is the amateur radio blog of a ham radio enthusiast who covers topics ranging from DMR hotspot upgrades and Parks on the Air activations to ham radio conventions like Hamvention 2025. The site also touches on FOSS tools, Raspberry Pi projects, and social media reflections, making it a lively personal record of life on the airwaves.
http://bitxhacks.blogspot.com/
BITX Hacks is a technical blog by Pete N6QW dedicated to modifications, hacks, and experiments with the BITX40 and uBitx transceiver boards. Posts cover hands-on hardware tweaks like display upgrades, inline fuse wiring, and external linear amplifier controls, making it a practical resource for amateur radio homebrewers.
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://fishesofaustralia.net.au/
Fishes of Australia is a comprehensive reference database hosted by Museums Victoria on behalf of the OzFishNet community, covering the diversity and biology of Australia's marine and freshwater fish species. Visitors can explore an interactive Lucid Key for identifying freshwater fishes, a picture-based Family Finder, and detailed species profiles like the rare Whiskered Prowfish.
https://scanwarewebhost.com/
G. McAvoy (KG7XD) built this resource hub centered on radio scanning, featuring a live FCC database query tool for all US AM, FM, and TV stations. Quick-links to scanner frequencies, fire, police, EMS, ham radio resources, and weather make it a handy reference for radio enthusiasts.
http://spider.seds.org/spider/Misc/naming.html
A detailed reference page from SEDS (Students for the Exploration and Development of Space) explaining how stars are named, from ancient cultural traditions to modern systematic schemes like the Bayer designation system introduced in 1603. Created by Hartmut Frommert and Christine Kronberg, the page covers Greek letter designations, star catalogs, IAU nomenclature standards, and debunks commercial 'name a star' schemes.
http://k0ham.com/
K0HAM is an amateur radio operator's personal site, identifiable by the callsign-based domain that follows standard ham radio naming conventions. The site uses a frames-based layout typical of early web design, suggesting a hobbyist page dedicated to ham radio activity and resources.
https://www.andrews.edu/~burton/mathlinks/coolmathlinks.htm
A curated collection of mathematics education links compiled at Andrews University, organized into sections for teachers, parents, and students across K-12 grade levels. The directory covers lesson plans, interactive activities, problem-solving resources, and NCTM-aligned curriculum materials from across the early web.
https://solorb.com/elect
FC's Electronic Circuits is a sprawling hobbyist archive packed with schematics and project descriptions covering everything from solar charge controllers and LED circuits to tube amplifiers, Geiger counters, and amateur radio gear. With dozens of original circuit designs, Arduino projects, and links to related ham radio and electronics builders, this site is a goldmine for DIY electronics enthusiasts.