Science & Nature
1413 sites
Subcategories:
- Astronomy & Space (390)
- Chemistry (7)
- Earth Sciences (24)
- Biology (76)
- Physics (29)
- Mathematics (51)
- Weather & Climate (100)
- Amateur Radio (681)
- Electronics (45)
https://minnesotasky.tripod.com/
The Steele County Astronomical Society (SCAS) is an Owatonna, Minnesota-based astronomy club affiliated with the Astronomical League, organizing events like Messier Marathons, park viewing nights, and observatory tours. The site lists the club's annual schedule, membership information, and links to the Owatonna Clear Dark Sky Report for planning observation sessions.
![Hurricane Forecast Model Output :: [Main]](/screenshots/26361.webp)
https://web.uwm.edu/hurricane-models/models
Hosted at the University of Wisconsin-Milwaukee, this site by Clark Evans provides hurricane forecast model output for the North Atlantic, Eastern Pacific, and Central Pacific basins. It offers an archive, storm identifiers, shapefiles, KML data, analogs, and verification tools, making it a technical reference for tracking tropical storm activity.
https://solarpower.guide/
Bob Robertson's hobby site is a sprawling reference on solar power, covering everything from basic definitions and how solar panels work to educational guides for kids and van-life solar setups. With dozens of articles on renewable energy topics, it reads like a one-man encyclopedia built by a retiree passionate about the subject.
https://itis.gov/
ITIS is the official Integrated Taxonomic Information System, a partnership between U.S. federal agencies and global specialists providing authoritative scientific names and taxonomic classifications for plants, animals, fungi, and microbes worldwide. Researchers and biodiversity professionals can search by common name, scientific name, or TSN identifier, access hierarchical taxonomic reports, and download the full database for integration into their own projects.
http://bbastrodesigns.com/
Mel Bartels runs this personal hub covering amateur telescope making alongside his BBAstroDesigns venture and beekeeping with top bar hives. The site blends hands-on astronomical craftsmanship with natural observations like ice spikes, sun rainbows, and sun pillars.
https://westernsoundscape.org/
Housed at the University of Utah's J. Willard Marriott Library, the Western Soundscape Archive offers thousands of audio recordings of animal species and ambient environments across eleven western U.S. states and the Arctic National Wildlife Refuge. Visitors can search or browse recordings of over 570 bird species, frogs, toads, reptiles, mammals, and wild landscape soundscapes contributed by volunteers, government agencies, and conservation groups.
https://hharc.org/
The Huber Heights Amateur Radio Club (HHARC), operating under call sign NO8I, is a welcoming Ohio-based club that supports two local repeaters and hosts monthly meetings for licensed and unlicensed radio enthusiasts alike. The site provides repeater frequencies, D-Star and AllStar node info, area nets, license testing resources, and links to ARRL and Ohio Section resources.
https://electriciantraining.tpub.com/14182
A comprehensive online reference covering the U.S. Navy's NEETS Module 10, this resource walks through wave propagation, transmission lines, and antenna theory with detailed chapters on electromagnetic fields, radio wave propagation, and sound waves. Published by Integrated Publishing, it offers the full technical training manual with options to download as PDF or order in print, making it a valuable reference for electronics students and hobbyists alike.
http://ctarl.org.tw/
The Chinese Taipei Amateur Radio League (CTARL) is the official national organization for amateur radio operators in Taiwan, serving as the hub for licensing, technical forums, contests, and emergency communications. The site lists multiple contact addresses across Taiwan and references notable callsigns like BV0HQ and BQ9P, making it a key resource for ham radio activity in the region.
http://hamuniverse.com/antennas.html
Hamuniverse.com, run by N4UJW, is a comprehensive ham radio resource site with a dedicated Antenna Design Lab offering hundreds of antenna projects, designs, and build guides for amateur radio operators. Visitors can browse antenna types by band, explore digital modes, study for license exams, and tap into a wide range of technical articles covering everything from repeaters to emergency power.