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)
http://w7zoi.net/
The personal site of Wes Hayward (W7ZOI), a well-known amateur radio engineer and co-author of 'Experimental Methods in RF Design' (EMRFD), featuring technical articles, filter design resources, errata, and glimpses of his ham shack. A rich destination for radio homebrewers and RF enthusiasts, with bonus content covering mountain hikes that incorporated amateur radio operation.
http://g3pho.free-online.co.uk/microwaves
A hobbyist site dedicated to microwave frequencies above 1000MHz, inviting visitors to explore the upper reaches of the amateur radio spectrum. The site is part of the Amateur Radio World Ring webring, connecting enthusiasts focused on microwave and UHF/SHF band experimentation.
http://sten.astronomycafe.net/the-astronomy-cafe
NASA scientist-educator Sten Odenwald has maintained this astronomy education hub for over 20 years, filling it with popular essays on cosmology, black holes, space travel, and the weird corners of nature. Visitors will find Q&A resources, blog posts on recent space discoveries, and details on his published books including a photo-filled history of space exploration through 100 iconic objects.
http://meteorlab.com/
New England Meteoritical Services (meteorlab.com) is a long-running resource dedicated to everything about meteorites, including identification, appraisal, and high-resolution structural imagery through a companion site covering primary and secondary meteorite structures. The organization has been online since 1994 and served as examiner and appraiser of the historic Huss-Nininger Collection of Meteorites and Tektites, making it a notable reference for both collectors and researchers.
https://webbdeepsky.com/
The Webb Deep-Sky Society is an international organization founded in 1967 bringing together amateur and professional astronomers devoted to observing double stars and deep-sky objects such as galaxies, nebulae, and clusters. Members receive access to publications like The Deep-Sky Observer, monthly featured objects, star atlases, and invitations to annual meetings and star parties.
https://www.qsl.net/mara/index.html
The Madison Area Repeater Association (MARA) is a non-profit amateur radio club based in Madison, Wisconsin, affiliated with the Wisconsin Association of Repeaters. This page serves as a hub for club members, listing meeting times and locations while redirecting visitors to their newer site.
https://nasawatch.com/
NASA Watch is a long-running independent watchdog site run by Keith Cowing, covering NASA news, policy, personnel changes, and space exploration with a critical insider perspective. With archives stretching back to 1993, it tracks everything from Artemis and ISS developments to congressional oversight and agency politics.
http://lakes.chebucto.org/ZOOBENTH/BENTHOS/benthos.html
A comprehensive scientific reference on freshwater benthic ecology and aquatic entomology, covering macroinvertebrate taxa from mayflies and dragonflies to beetles and caddisflies across dozens of detailed chapters. Produced by the Soil and Water Conservation Society of Metro Halifax, this site offers taxa tolerance values, biological monitoring protocols, and research reports focused on freshwater ecosystems in Nova Scotia and beyond.
http://eqsl.cc/qslcard
eQSL.cc is the premier online platform for amateur radio operators to exchange electronic QSL cards, the digital equivalent of the traditional confirmation cards sent between hams after a contact. The site supports logging, awards tracking, contest records, and international callsign lookup, making it an essential hub for the global ham radio community.
https://www.qsl.net/harc-az
The Hassayampa Amateur Radio Club (HARC) of Arizona maintains this QSL.net-hosted hub for local ham radio operators in the region. Visitors can find club information, meeting details, and resources connecting amateur radio enthusiasts in the Arizona area.