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://departments.bucknell.edu/biology/resources/msw3
Hosted at Bucknell University, this online database presents the complete third edition of 'Mammal Species of the World' (MSW3), edited by Don E. Wilson and DeeAnn M. Reeder, covering taxonomic and geographic reference data for all recognized mammal species. Researchers and enthusiasts can browse the full hierarchy from Order down to Subspecies, search by scientific or common name, and even export the entire taxonomy as a CSV file.
https://allstarlink.org/
AllStarLink is a non-profit network connecting amateur radio repeaters, remote base stations, and hot spots worldwide using Voice over Internet Protocol built on the open-source Asterisk PBX platform. Ham radio operators can set up their own nodes on hardware as accessible as a Raspberry Pi, linking to thousands of other stations globally with full-duplex audio and Echolink compatibility.
https://w5ddl.org/
The Acadiana Amateur Radio Association (W5DDL) is a 501(c)3 nonprofit club based in Lafayette, Louisiana, serving the Acadiana region since 1953. The site provides club members and visitors with information on meetings, nets, emergency communications, repeaters, licensing exams, and membership details.
http://aimspice.com/
AimSpice appears to be a SPICE circuit simulation software site, offering tools for electronic circuit analysis and modeling. The minimalist page redirects visitors to the main document, suggesting a focused software or technical resource for electronics engineers and hobbyists.
http://ve7sl.blogspot.com/
VE7SL is Steve's amateur radio blog chronicling his homebrewing projects and on-air adventures across an extraordinary range of frequencies, from 2200 meters all the way up to nanowaves. Posts dive deep into technical details like antenna construction, low-band operating on 630m, and solar propagation data, making it a rich resource for experimentally-minded hams.
https://w7dk.org/
The Radio Club of Tacoma (W7DK) is a nonprofit organization serving FCC-licensed ham radio operators in Pierce County, Washington and the South Puget Sound region. Members and visitors can find information on club meetings, repeaters, license exams, emergency communications, and the W7OS Antique Radio Museum.
https://web.psrg.org/
The Puget Sound Repeater Group (PSRG) is a Seattle-area amateur radio club managing a network of repeaters, remote HF stations, and regular nets for ham radio operators in the Pacific Northwest. The site offers member resources, licensing exam info, educational presentations, and tools like live voter scopes and EchoLink/AllStar connectivity details.
https://ocraces.org/
OCRACES is the official site for the County of Orange Radio Amateur Civil Emergency Service, an auxiliary communications unit operating under the Orange County Sheriff's Department Emergency Management Division. Visitors can find membership information, net schedules, past events, and details about how trained amateur radio operators provide voice, video, and data emergency communications during disasters.
http://cvafresno.org/
The Central Valley Astronomers is an amateur astronomy club based in Fresno, California, welcoming everyone from beginners to seasoned professionals with star parties, astrophotography, and educational meetings. The site includes a club calendar, membership info, a Young Astronomer Program, star party etiquette guides, light pollution resources, and tips on purchasing equipment.
https://themineralgallery.com/
The Mineral Gallery is a comprehensive online reference dedicated to minerals, featuring detailed descriptions, chemical formulas, physical properties, and photographs of hundreds of mineral specimens. It serves as an invaluable resource for collectors, geology students, and enthusiasts seeking in-depth information on everything from common quartz varieties to rare sulfosalts.