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://users.erols.com/njastro/orgs/ndsos.htm
The National Deep Sky Observers Society (NDSOS) is a worldwide amateur astronomy organization founded in 1976, dedicated to those who observe galaxies, nebulae, and star clusters. Members receive a quarterly journal called Betelgeuse, access to professional astronomical databases, and networking with fellow deep sky enthusiasts across the globe.
http://astronomy.net/
Astronomy.Net is a comprehensive hub for amateur and professional astronomers alike, offering articles, forums, constellation guides, sky event calendars, and equipment classifieds all in one place. Built and maintained by John Huggins since 1994, the site covers everything from telescope optics and astrophotography to meteor showers and planetary conjunctions.
https://www.qsl.net/n1bwt/contents.htm
Paul Wade W1GHZ has published his comprehensive Microwave Antenna Book online, covering everything from parabolic dish antennas and horn feeds to electromagnetic field analysis and antenna range measurements. A deep technical reference spanning 13 chapters with downloadable software tools, this is an essential resource for amateur radio operators working in the microwave frequency bands.
https://golem.ph.utexas.edu/string/index.shtml
The String Coffee Table is a collaborative group blog hosted at the University of Texas at Austin, bringing together physicists to discuss string theory, loop quantum gravity, conformal field theory, and related advanced topics. Posts make heavy use of MathML for rendering equations, and contributors include researchers like Urs Schreiber and Lubos Motl, making it a rich academic resource for cutting-edge theoretical physics.
https://birdlist.org/index.htm
BirdList.org is a comprehensive global reference cataloging over 10,000 bird species across 200 countries, with data coded for abundance, breeding, migration, wintering, and endemic status. Run by professional biologists affiliated with the World Institute for Conservation and Environment, the site also offers bird tour listings for destinations like Peru, Ecuador, Ethiopia, and Uganda, with species lists available in multiple languages.
https://morseresource.com/
MorseResource, created by AI4QR, offers tools and resources for learning and improving Morse code skills, including code generators, daily quote MP3 files, and Morse code podcasts. The podcast idea was born from a desire to practice copying code anywhere, making this a practical and inventive hub for amateur radio enthusiasts.
https://astronomyedinburgh.org/
The Astronomical Society of Edinburgh has been sharing a love of astronomy since 1924, hosting hybrid in-person and online meetings, observing group sessions, and public talks several times a month. Visitors can explore sky diaries, knowledge articles, beginner observing lists, meteor camera data, and a Messier/Caldwell project archive alongside a live interactive solar system map.
https://pembsbirds.blogspot.com/
Pembrokeshire Birds is a long-running blog dedicated to birdwatching observations across Pembrokeshire, Wales, covering sightings from notable sites like Skokholm Island and Teifi Marshes. With records dating back to 2008, annual reports, species lists, and detailed field notes, it serves as a rich regional ornithological resource for birders interested in Welsh wildlife.
https://qsl.net/ct1nmv
The Radio Scouting Department (Departamento de Rádio Escutismo) of the Moinhos de Vento Scout Group in Portugal claims to be the first Portuguese page dedicated to radio scouting, covering Jamboree-on-the-Air (JOTA), JOTI, QSL galleries, frequencies, repeaters, and amateur radio specialties for scouts. With dozens of sections including DXCC, IOTA, telegraphy, scout call books, and historical records, this is a rich resource for the intersection of amateur radio and the scouting movement.
http://worldofradio.com/anomaly.html
World of Radio is a long-running shortwave and DX radio program archive, offering hundreds of downloadable and streamable MP3 episodes spanning 2019 through 2026. The site also tracks the DX Listening Digest and anomaly alerts, making it an essential resource for shortwave listeners and DXers worldwide.