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)
http://vectorbd.com/sw_review.html
Compiled by John Lloyd (KE4UTX), this site collects shortwave receiver reviews submitted by readers of the Rec.radio.shortwave newsgroup, covering dozens of models from brands like Sony, Grundig, Icom, Kenwood, and Sangean. Each review includes pricing, dimensions, and hands-on user impressions, making it a practical reference for shortwave enthusiasts comparing receivers.
https://qsl.net/wa6rc
The Westside Amateur Radio Club has served ham radio operators in the West Los Angeles area since 1987, earning recognition from the ARRL for emergency communications and advocacy against restrictive antenna ordinances. Visitors can find club meeting schedules, weekly net frequencies, Field Day event recaps, and an Elmers program connecting members with experienced hams for free guidance.
https://stormdude.com/stormchasing/stormchasing.html
Stormdude is a personal storm chasing site documenting decades of adventures across the Great Plains in pursuit of supercells, with photo journals spanning from 1998 through 2027. The site features a main gallery, top chase days highlights, humor pages, and lists of other storm chasers, making it a rich archive for weather enthusiasts.
http://thehellhole.com/
A detailed German-language educational site covering black holes and singularities, exploring topics from stellar and supermassive black holes to Hawking radiation, mathematical models, and even the theoretical dangers of black holes at CERN. The site draws a fascinating parallel between modern astrophysics and Norse mythology's concept of the Maelstrom, making complex science accessible through storytelling.
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.
http://yearinspace.com/the-week-in-space
The Year In Space is a weekly online calendar that highlights space history, sky events, and astronomical milestones, pairing each entry with detailed write-ups and NASA imagery. Each week features a featured topic such as the discovery of Ceres or the Cassini mission, alongside a day-by-day calendar of notable birthdays, launches, and celestial events.
http://www-k12.atmos.washington.edu/k12/grayskies
Hosted by the University of Washington's Atmospheric Sciences department, GRAYSKIES is an educational resource focused on Earth's atmosphere, offering climate data, rooftop weather observations, and curated links to Pacific Northwest weather and climate tools. Visitors can explore 30-year climate averages, satellite imagery, and data plotting tools alongside a broad collection of regional and national weather resources.
http://k5dkz.com/
Frank Kamp's K5DKZ ham shack site is a rich technical resource covering homebrew radio equipment, antennas, amplifiers, and repairs for classic rigs like Collins, Drake, and Heathkit gear. Visitors will find detailed pages on building tube amplifiers, Z-match tuners, DX-60 and DX-20 clones, and a wide variety of antenna designs from vertical beams to trap dipoles.
https://w7yrc.org/
The Yavapai Amateur Radio Club (W7YRC) serves ham radio enthusiasts in the Prescott, Arizona area with license classes, repeater information, club events, and public service opportunities. The site offers a wealth of resources including study materials for license exams, a monthly newsletter called the YARC Signal, and details on events like Field Day and the Prescott Hamfest.
http://williamson-labs.com/
Williamson Labs is a comprehensive electronics tutorial site covering foundational topics like transistors, op-amps, 555 timers, and circuit design for learners at various levels. It serves as a structured educational reference for anyone looking to understand basic and intermediate electronics concepts through instructional content.