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)
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.
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.
http://briancoad.com/main.asp
Brian W. Coad, a retired ichthyologist from the Canadian Museum of Nature in Ottawa, shares decades of expertise through resources including a Dictionary of Ichthyology, annotated checklists of Canadian fishes, and detailed studies of freshwater fishes from Iran and Iraq. The site is a remarkable reference collection for anyone interested in fish taxonomy, zoogeography, and biodiversity, with content serious enough to be published as academic papers and books.
https://ei7gl.blogspot.com/2026/02/video-solar-cycle-25-expectations-in.html
John, EI7GL, runs this long-running amateur radio diary covering propagation experiments, solar cycle updates, and band activity across frequencies from medium wave to microwaves. The site is a treasure trove for radio enthusiasts, featuring detailed posts on DX contacts, digital modes, and radio science with an impressive archive of callsigns and events.
https://helicoprion.neocities.org/
A shrine dedicated to Helicoprion, the ancient spiral-toothed shark whose bizarre whorl jaw has fascinated paleontologists for decades. The site includes speculative audio of how the creature might have sounded and even a campaign to vote Helicoprion into the fighting game SkullGirls, showing real enthusiasm for this prehistoric oddity.
https://nj2bb.org/
The Battleship New Jersey Amateur Radio Station (BNJARS) is a non-profit club operating amateur radio aboard the historic USS New Jersey museum ship in the Delaware Valley area. The site covers station information, guest operator details, WWII radio restoration projects, QSL card info, and club activities tied to promoting the battleship through worldwide amateur radio contacts.
https://fortworthastro.com/
The Fort Worth Astronomical Society (FWAS) has been bringing amateur astronomy to North Texas since 1949, making it one of the oldest and largest such clubs in the country with over 200 active members. Visitors can find information on membership, club meetings, dark sky observing sites, star parties, and public outreach events conducted for local schools and organizations.
https://oklo.org/
Oklo, written by Greg, is a long-running science blog that explores astrophysics, cosmology, and cutting-edge topics like interstellar objects, exoplanets, and the physics of computation. Posts blend deep technical thinking with wide-ranging curiosity, touching on thermodynamics, AI, and space science in a way that rewards careful reading.
http://fbdd-lit.blogspot.com/
Molecular Design is a scientific blog exploring the manipulation of molecular properties to control the behavior of compounds and materials, written by contributors including Mel Peter Kenny. Posts blend technical drug discovery topics like Hit to Lead optimization with personal observations from Trinidad and the UK, giving the site a distinctive voice that mixes rigorous science with vivid storytelling.
http://talkorigins.org/
The TalkOrigins Archive is a comprehensive collection of articles, essays, and FAQs dedicated to presenting mainstream scientific responses to creationism, intelligent design, and evolution denial. Drawing from the long-running talk.origins Usenet newsgroup, it covers topics ranging from evolutionary biology and geology to abiogenesis, cosmology, and the age of the Earth.