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://meteorite-identification.com/
Meteorite-identification.com helps enthusiasts and beginners distinguish genuine meteorites from 'meteor-wrongs,' offering identification tests, case studies of misidentified specimens, and commentary on media coverage of meteorite claims. The site also covers meteorite collecting as a hobby, with guidance on buying specimens and evaluating suspect auction listings on eBay.
https://w0aa.org/
The Minnesota Wireless Association (MWA) is a ham radio club dedicated to radiosport and competitive contesting from Minnesota, featuring scores and results for major events like CQWW, ARRL contests, and the MN QSO Party. The site serves as a hub for members to submit logs, track standings across multiple contest seasons dating back to 2010, and access resources for amateur radio operations.
https://oeis.org/
The OEIS is a massive searchable database of over 393,000 integer sequences, maintained by the OEIS Foundation and originally created by mathematician Neil Sloane. Researchers, students, and math enthusiasts can look up sequences by entering numbers to identify patterns, explore combinatorics, and discover connections across mathematical disciplines.
https://ei7gl.blogspot.com/
John, EI7GL, runs this detailed amateur radio diary chronicling propagation experiments, solar cycle activity, and DX contacts across a wide range of frequency bands from Medium Wave to Microwaves. With thousands of labeled posts covering callsigns from around the world, solar flux data, and band opening reports, it is an invaluable log for radio enthusiasts following HF and VHF propagation conditions.
http://laughingpoliceman.com/
The Laughing Policeman Wireless Society (LPWS) is a long-running alternative amateur radio club founded in 1978, dedicated to celebrating the humorous and absurd side of the hobby through audio recordings, court cases involving radio pirates, repeater antics, and radio buffoonery. The site is packed with sections covering pirate radio, CB court cases, Russian jammers, CTCSS tones, and even a "History of Swearing," making it a uniquely entertaining corner of the amateur radio world.
https://sky-chaser.com/
Christopher Collura's Sky-Chaser site chronicles his adventures as a SKYWARN storm spotter and hurricane chaser, with tropical weather tracking, storm documentation, and real-time links to NHC and JTWC data. Beyond extreme weather journalism, the site covers his many pursuits including skydiving, HAM radio, photography, computer programming, and aerobatics.
http://xmlog.com/
XMLog is a free amateur radio logbook application for Windows, created by Michael McAmis (W1ECT), offering flexible log searching, awards tracking for DXCC, WAZ, and WAS, LoTW integration, and callbook lookups. The site serves as the official download and support hub for the software, with documentation, beta releases, and a linked community group on groups.io.
http://capitalastronomers.org/
The National Capital Astronomers is a Washington D.C. metro area nonprofit astronomy club founded in 1937 at the US Naval Observatory, offering monthly star talks, public telescope events at Rock Creek National Park, and science fair outreach programs. Members and visitors can find meeting lecture videos, telescope-making workshop info, stargazing tips, and membership details for this long-running amateur astronomy society.
https://setiathome.ssl.berkeley.edu/
SETI@home is the legendary UC Berkeley distributed computing project that enlisted millions of volunteers worldwide to analyze radio telescope data in the Search for Extraterrestrial Intelligence. Though now in hibernation and no longer distributing tasks, the site preserves its community message boards, user statistics, and ongoing back-end data analysis efforts that continue to this day.
https://www.qsl.net/7n3wvm
MINOWA Makoto (7N3WVM) shares detailed homebrew QRP amateur radio projects built entirely from scratch at his shack in Chiba, Japan. Visitors will find construction guides for transceivers, antenna tuners, crystal filters, frequency markers, magnetic loop antennas, and various measurement tools, all documented in both Japanese and English.