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://rainforest.gardenwebs.net/
Stern's Splendors of the Rain Forest is a richly illustrated site dedicated to tropical plants, focusing on orchids, bromeliads, tillandsias, cacti, and succulents native to the Americas. Featuring exotic photo galleries, cultural guides, and links to major plant societies worldwide, it serves as an enthusiast's showcase for rain forest horticulture.
https://planetmath.org/
PlanetMath.org is a collaboratively built mathematics encyclopedia where community members write and review entries covering a vast range of mathematical topics, all rendered in LaTeX. Hosted by the University of Waterloo and operated as a nonprofit, it offers both a subject index and alphabetical index, making it a serious reference hub for students, educators, and math enthusiasts.
http://users.rcn.com/rmacedo
Robert Macedo's homepage covers emergency communications in Eastern Massachusetts, with a focus on ARES, RACES, and SKYWARN activities including severe weather activation reports dating back to 1997. The site documents real storm events like nor'easters, tropical storms, and severe weather outbreaks alongside training drills, NWS Taunton SKYWARN program info, and links to ham radio and weather resources nationwide.
https://w6ka.net/
The Pasadena Radio Club (W6KA) is a Southern California ham radio club offering meetings at Kaiser Permanente in Pasadena with simultaneous Zoom access, plus contests, Field Day events, and local repeater information. The site features a bulletin archive, event calendar, membership resources, and a library of reference materials for both newcomers and experienced amateur radio operators.
https://www.qsl.net/wb1asl
WB1ASL's personal ham radio page dedicated to vintage 'boatanchor' radio equipment, featuring Rich's own collection including a Hammarlund HQ-170 and a Lil' LuLu prototype. The site also curates shortwave listening links including Glenn Hauser's World of Radio and DXing resources for radio enthusiasts.
http://metroplex.org/
The Metroplex Amateur Radio Association (ARA) out of Fort Lee, NJ maintains this page listing their repeater frequencies, EchoLink node information, and club officers. A historic photo of core members from 2000 honors the club's founder, Alex Magocsi W2OV, and a membership application form is available for prospective hams.
https://math.columbia.edu/~woit/wordpress?p=15620
Peter Woit's 'Not Even Wrong' is a long-running physics blog hosted at Columbia University, covering cutting-edge topics in theoretical physics including twistor theory, quantum field theory, and the mathematics of unification. Woit writes with deep technical expertise and a critical perspective, making this a destination for mathematically sophisticated readers interested in the foundations of modern physics.
https://shallowsky.com/jupiter.html
Akkana Peck's Juplet page offers a Java applet and JavaScript tool for tracking the positions of Jupiter's four Galilean moons, their shadows, and the Great Red Spot in real time. A labor of love rooted in real astronomical calculations from Jean Meeus' algorithms, the page also includes telescope sketches, links to Jupiter observation resources, and satellite event data.
https://k8vsy.radio/
K8VSY is the amateur radio blog of a ham radio enthusiast who covers topics ranging from DMR hotspot upgrades and Parks on the Air activations to ham radio conventions like Hamvention 2025. The site also touches on FOSS tools, Raspberry Pi projects, and social media reflections, making it a lively personal record of life on the airwaves.
http://k3pgp.org/
K3PGP's Experimenter's Corner is a wide-ranging amateur radio and electronics hobbyist site covering everything from VLF to light, including moonbounce (EME), lasers, antenna construction, and weak signal work. Run by the operator K3PGP, the site spans decades of experimentation and also touches on astronomy, bicycle construction, and software.