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://monitoringtimes.com/html/mtswlprimer1.html
A beginner's guide to shortwave radio listening from Monitoring Times, written by Ken Reitz, covering how to choose the right receiver across price ranges from budget portables to professional communications receivers. The article walks newcomers through buying new versus used equipment, notable brands like Sony, Sangean, and Grundig, and even vintage shortwave sets worth hunting down at ham fests.
https://atmos.uw.edu/marka/id.normals.html
A reference page from the University of Washington's atmospheric sciences department presenting observed climate normals for Idaho and western Montana spanning 1971 to 2000. Visitors can click on map markers to view mean monthly precipitation, mean daily maximum temperatures, and mean daily minimum temperatures for specific locations.
https://midwesternstormtrackers.net/
Midwestern Storm Trackers (MST) is a group dedicated to real-time storm chasing, severe weather reporting, and community weather awareness across the Midwest US. The site features team profiles, chase vehicles, a gallery, videos, and a browse-chases section for following their storm tracking activities.
http://wordwizz.com/pwrsof10.htm
Bruce Bryson's 'Quarks to Quasars' takes visitors on a visual journey through the universe using powers of ten, spanning from subatomic particles smaller than 10^-18 meters to the observable cosmos at 10^26 meters. With nearly 200 pages of original drawings and images, each step in scale reveals ten times more or less of the universe, making it a deeply immersive and educational exploration of cosmic scale.
http://srim.org/
James Ziegler's authoritative site hosts SRIM and TRIM, widely used scientific software packages that calculate the stopping and range of ions in matter for research and engineering applications. The site includes downloadable software, textbooks, tutorials, a historical review spanning 100 years of ion stopping research, and resources covering topics from cosmic ray soft errors to neutron damage.
https://jeff560.tripod.com/mathword.html
Jeff Miller's meticulously researched reference page tracks the earliest known uses of mathematical terminology, tracing when and where specific math words first appeared in historical texts. This is a unique etymological resource for mathematicians, historians, and anyone curious about the origins of the language of mathematics.
https://erau.ee/et
The Estonian Amateur Radio Union (ERAÜ) is the official national organization for ham radio operators in Estonia, a member of IARU since 1938. The site offers extensive resources including contest calendars, repeater and beacon info, exam guidance, QSL services, SDR links, and club directories, all available in Estonian and English.
https://owlsp.com/stormchaseaccounts.php
OWLSP.com is a storm chaser's personal archive covering tornado and severe weather chase accounts from 2002 through 2023, with detailed entries for specific outbreaks across Oklahoma, Texas, Kansas, and beyond. The site includes chase narratives, photography, equipment info, and landscape scenes, making it a rich firsthand record of Plains storm chasing over two decades.
https://www.qsl.net/k5wtx
K5WTX is the personal ham radio page of an Oklahoma City amateur operator and petroleum geologist with a callsign history dating back to 1973. The site covers vintage radio equipment collecting (Drake, Ten Tec, Hallicrafters), a collection of 50 antique telegraph 'bug' keys, weather station data, and Jeep trail exploration.
https://425dxn.org/
425 DX News is a long-running Italian weekly bulletin for serious DXers, founded in May 1991 and now past its 1800th issue, covering rare DX expeditions, contest calendars, and DX cluster updates. Produced by Mauro I1JQJ, Valeria IK1ADH, and a dedicated team of amateur radio operators, it serves the global ham radio community with bulletins, a searchable database, and a magazine.