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://dxer.com/
DXer.com is a site centered around amateur ham radio and CW (Morse code) operation, catering to DXers who pursue long-distance radio contacts. The page appears minimal but targets a niche community of ham radio enthusiasts with an interest in DX chasing.
https://www.qsl.net/farg
The Friends of Amateur Radio Group (FARG), operating under callsign N9LCR, is a Chicago-area amateur radio club promoting radio knowledge, fraternalism, and community outreach through multiple digital and Allstar nets. The site connects members and visitors to club nets like the Net with No Name, Teapots Tech-Friday Net, and Kidz Connection Net, and features event coverage from Field Day and the Yuma Hamfest.
https://www.qsl.net/dl5dbm/HAM/hbrew.htm
DL5DBM's homebrew page is a technical treasure trove for amateur radio operators, featuring detailed documentation for self-built projects including a 1 KW 2-meter power amplifier, antenna preamps, transverters, baluns, and regulated power supplies. Projects span VHF, UHF, and 6-meter bands with downloadable schematics and guides in both English and German, making it a practical resource for hams who build their own equipment.
https://m0pqa.com/
Pablo (M0PQA) runs this technical amateur radio blog covering hands-on projects like firmware recovery, AllStar node modifications, APRS gateways, and packet radio on Raspberry Pi. The posts are detailed and practical, making it a valuable reference for hams tackling real-world station challenges.
https://swling.com/blog/2026/03/shelfmarks-and-shortwave
The SWLing Post is a dedicated blog covering shortwave listening, ham radio, DXing, SDR technology, and radio broadcasting from around the world. With reviews, program schedules, equipment guides, and community contributions, it's a rich hub for radio enthusiasts of all stripes.
http://tudorchemicals.co.uk/
Tudor Chemicals explores the surprisingly rich world of chemistry as it existed in Tudor-era England, covering topics like homemade cleaning agents, gunpowder, alchemy, and aqua regia. Visitors curious about historical science will find accessible explanations of how ordinary households used chemical processes long before the science was formally understood.
https://rocksandminerals4u.com/
Rocks and Minerals 4U is a comprehensive educational resource covering geology topics including rock formation, mineral identification, plate tectonics, and the rock cycle, with dedicated pages for igneous, metamorphic, and sedimentary rocks. Designed for collectors, students, homeschoolers, and teachers, the site offers lesson plans, crossword puzzles, photo galleries, and even a shop for rock and mineral specimens.
http://mistisoftware.com/astronomy/index.htm
Misti Mountain Observatory is an amateur astronomy site featuring stunning astrophotography captured with a 32-inch Ritchey-Chretien telescope in Arizona, covering galaxies, nebulae, star clusters, and solar system objects. The site includes detailed equipment notes, film and CCD imaging data, conference listings, and even a specialized app that lets blind and visually impaired users explore astronomical images through musical tones.
http://yorktonstormhunter.com/
Ryan Crouse's storm hunting site documents extreme weather events across Yorkton, Saskatchewan, featuring lightning photography, storm clouds, and road condition updates. A personal hub for a dedicated storm chaser covering the Canadian prairies, with live streams and weather photos from the region.
https://qrp-labs.com/
QRP Labs sells a wide range of amateur radio kits including multi-band transceivers, CW rigs, GPS receivers, synthesizers, and high-altitude balloon trackers at budget-friendly prices. The site is a go-to destination for QRP radio enthusiasts who enjoy building their own equipment, with kits ranging from beginner-friendly to highly technical designs like the WSPR balloon tracker.