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://lavajunkie.com/gallery.html
Lavajunkie.com is a passionate photography gallery dedicated to the volcanic activity of Kilauea, Hawaii, featuring extensive collections of lava flows entering the Pacific Ocean, surface flows, dawn shots, and even images purportedly showing the Hawaiian volcano goddess Pele. With over 20 gallery pages organized into themed collections, this site captures the raw spectacle of new earth being formed and invites armchair lava junkies to experience the phenomenon from their screens.
https://dailydx.com/propagation
The Daily DX is a hub for ham radio operators focused on DXing, offering a curated propagation page with links to solar data, space weather forecasts, and VOACAP prediction tools. Visitors can track HF propagation conditions, solar activity, and greyline predictions to optimize their chances of reaching distant or weak-signal stations.
https://members.tripod.com/~Sam_KD6PIZ/index.html
Samuel Thornton (KD6PIZ) shares his ham radio hobby alongside family photos and links to WWII warbird organizations on this classic Tripod personal page. An active U.S. Air Force member stationed in Columbus, Mississippi, Sam mixes his passion for amateur radio with interests in historical aircraft like the B-17 and B-24.
https://dra73.org/
The Delaware Repeater Association (DRA) is a ham radio club founded in 1973 that maintains repeaters across Delaware and holds quarterly in-person meetings at the Route 40 Diner in Bear, DE with a Zoom option for remote members. The site covers club membership, dues, leadership, meeting schedules, and links to regional amateur radio resources including ARES groups and VE testing.
https://ncdxf.org/
The Northern California DX Foundation (NCDXF) is a charitable organization founded in 1972 that provides financial support for DXpeditions to rare DXCC entities around the world. Visitors can explore funded expeditions, apply for grants, learn about the NCDXF-IARU Beacon Project, and find resources for the amateur radio DX community.
http://blog.marxy.org/
Peter Marks (VK2ZZC) runs this long-running blog blending amateur radio experimentation, particularly FreeDV digital voice modes, with regular technology commentary for ABC Radio's Nightlife program. Visitors will find net reports, homebrew radio projects, and tech takes on AI, Apple, and social media policy alongside links to the amateur radio community.
https://k7su.com/
Kelly Klaas (K7SU) runs this personal hub covering amateur radio, handmade Morse code keys, woodworking, laser engraving, and voice-over work. The site serves as a launchpad to several distinct projects, with the handmade keys and ham radio content being the clear centerpiece.
http://zl2ctm.blogspot.com/2025/01/40m-pelican-case-ssb-trabsceiver.html
Charlie Morris (ZL2CTM) documents his amateur radio homebrew experiments, including this detailed post on building a 40m SSB transceiver housed in a Pelican case, complete with Arduino code for the Si5351 VFO and LCD control. The blog covers hands-on RF construction projects with schematics, code snippets, and supporting YouTube videos, making it a great resource for homebrewers interested in building their own transceivers.
https://theastronomer.tripod.com/
Tammy Plotner's astronomy site is a sprawling personal observatory journal covering years of nightly observing reports, constellation starhop guides, solar and lunar photography, aurora sightings, and deep sky sketches. With content spanning from 2001 to 2007 and sections on Messier studies, planetary transits, and star parties across Ohio and beyond, this is a genuine labor of love for backyard astronomers.
http://ibiblio.org/virtualcell/tour/cell/cell.htm
The Virtual Cell is an interactive educational tour of a biological cell, using extensive imagery to guide visitors through cellular structures and components. The included pronunciation guide and visual-heavy layout suggest this is a reference resource designed to help students and curious learners explore cell biology in an engaging, self-guided format.