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://cat.boffosocko.com/
A collaborative study group blog documenting UCLA Extension's 2015 Category Theory course led by Professor Michael Miller, covering abstract algebra, functors, and related mathematical structures. Participants followed a structured syllabus across multiple chapters, sharing notes, resources, LaTeX diagrams, and meeting summaries over the summer term.
https://qrp-labs.com/2-uncategorised/44-qrp-labs-shop.html
QRP Labs is a shop and resource hub for amateur radio enthusiasts, offering a wide range of kits including CW transceivers, digital transceivers, GPS receivers, WSPR/QRSS transmitters, and high-altitude balloon trackers. The site features an impressive catalog of homebrew-style radio kits catering to QRP (low power) operators, with supporting documentation, newsletters, and community resources.
https://chemguide.co.uk/index.html
Chemguide, created by Jim Clark, is a comprehensive chemistry reference site aimed at helping students aged 14 through A-level understand topics ranging from atomic structure and bonding to organic reaction mechanisms and physical chemistry. Covering major UK exam syllabuses including GCSE, CIE Cambridge International, and Edexcel, it serves as an authoritative free study aid with deep topic coverage across all major chemistry disciplines.
https://excaliburmineral.com/meteorite.htm
Excalibur Mineral Corporation offers a detailed sales catalog of meteorites and tektites, listing specimens by name, find date, locality, weight, and price. The catalog includes rare pallasites, chondrites, and scientifically documented samples with SEM imagery and quantitative chemistry, making it a destination for serious collectors.
https://ring.fediverse.radio/
Fediverse.Radio WebRing connects 35 amateur radio enthusiast sites whose operators are active on the Fediverse, the decentralized social network. Run by M0YNG, a licensed radio amateur in Gloucestershire, the ring makes it easy to discover blogs, personal pages, and resources from ham radio operators around the world.
https://awkwardbotany.com/
Awkward Botany is an amateur botany blog written for the "phytocurious," covering plant families, weed profiles, horticulture, urban ecology, and plant identification with genuine depth and enthusiasm. Posts like the detailed breakdown of Liatris microcephala and the Weeds of Boise series showcase careful research and a love of plant science that will delight both beginners and seasoned plant nerds.
https://diptera.info/weblinks.php?cat_id=1
Diptera.info is a comprehensive portal dedicated to the insect order Diptera, covering flies, midges, and gnats with galleries, checklists, catalogues, and an active identification forum for researchers and enthusiasts worldwide. With over 5,000 members, a larva gallery, downloadable articles, and curated web links to scientific collections and catalogues, it serves as a serious reference hub for dipterists at all levels.
http://sss-mag.com/eme.html
Part of the Spread Spectrum Scene (SSS Online) website, this page is a curated link directory focused on Earth-Moon-Earth (EME) moonbounce communications for ham radio operators. Visitors will find links to operator pages, equipment guides, activity loggers, and resources covering weak signal propagation, SETI, DSP, and related amateur radio topics.
https://spaceprojects.com/NASA
NASAWatch.INFO is an independent, sponsor-free watchdog site that critically examines NASA's bureaucracy, spending, and policies, advocating for commercial spaceflight and government reform. Visitors will find curated links, news articles, congressional bills, scandal coverage, and commentary pushing for a privatized, democratically accountable space program.
https://thevenustransit.com/
Run by Gadi Eidelheit, this astronomy blog covers celestial events like Venus transits, solar perihelion, lunar phases, and space missions with original photography. The site is a rich mix of observational astronomy and astrophotography, with an impressive archive of posts and labels spanning planets, eclipses, satellites, and even the Israeli Beresheet lunar mission.