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://craq.club/
The Club Radio Amateur de Québec (CRAQ), founded in 1926 and celebrating its 100th anniversary, is one of Quebec's oldest amateur radio clubs, offering membership resources, technical articles, repeater information, QSL cards, and licensing exam preparation. The site includes live HF operation logs, contest schedules, D-STAR networking stats, and a rich archive of club activities and events.
https://arandomsite.neocities.org/
Ariu is a high school junior from Indiana whose personal site documents a remarkable range of pursuits, from Drosophila genetics research and healthcare legislation advocacy to an AI tool for school nurses. The site serves as a living digital portfolio of someone genuinely engaged in science, medicine, and civic life at a young age.
https://webbdeepsky.com/
The Webb Deep-Sky Society is an international organization founded in 1967 bringing together amateur and professional astronomers devoted to observing double stars and deep-sky objects such as galaxies, nebulae, and clusters. Members receive access to publications like The Deep-Sky Observer, monthly featured objects, star atlases, and invitations to annual meetings and star parties.
http://astro.vaporia.com/start/transientastronomy.html
A detailed reference page from the astro.vaporia.com astrophysics index, covering transient astronomy and the study of short-lived astronomical phenomena such as supernovae, gamma-ray bursts, fast radio bursts, and gravitational wave events. It catalogs major sky surveys like ZTF, Pan-STARRS, and the Rubin Observatory, making it a useful entry point for anyone exploring time-domain astronomy.
https://qrper.com/2026/03/an-unexpected-journey-working-the-world-with-chewing-gum-and-duct-tape
QRPer is a blog dedicated to low-power amateur radio operation, featuring guest posts, homebrew transceiver builds, Morse code contacts, and field radio adventures. This particular post follows operator Sam (WN5C) as he completes QRP DXCC using a homebrew transceiver from his home shack, an inspiring story of persistence and improvisation over eight months.
https://n3yrw.tripod.com/index-3.html
Frank N3YRW's ham radio link collection is a curated gateway to the world of amateur radio, covering DX hunting, callsign lookups, equipment dealers, antennas, and upcoming DXpeditions. Packed with dozens of links to resources like QRZ, ARRL, Icom, Yaesu, and DX clusters, this page is a handy one-stop reference for hams of all experience levels.
http://amwindow.org/
The AM Window is a dedicated hub for amateur radio operators interested in AM (amplitude modulation) operation, covering everything from audio and antenna tech to vintage equipment like Collins, Heathkit, and Johnson rigs. Visitors can explore video and audio clips, technical mods, tutorials, net frequencies, and stories from the AM operator community.
https://h14s.p5r.org/2012/09/0x5f3759df.html
Christian Plesner Hansen's technical blog dives deep into the legendary fast inverse square root hack and its magic constant 0x5f3759df, tracing the algorithm's surprising history from Ardent Computer in the 1980s through SGI, 3dfx, and Quake III Arena. The post rigorously explains the underlying floating-point bit manipulation, generalizes the technique to arbitrary powers, and includes graphs and mathematical derivations that illuminate why this 'evil' hack actually works.
http://homingin.com/
Maintained by Joe Moell (K0OV) since 1988, Homing In is a comprehensive resource dedicated to radio direction finding, foxhunting, and amateur radio direction finding (ARDF) competitions worldwide. Visitors will find news about international championships, technical projects, equipment guides, event results, wildlife tracking applications, and a wealth of articles spanning decades of expertise in the hobby.
http://theperksofchasing.com/
A memorial site preserving the storm chasing adventures of Jeff Wear, who was tragically killed in a traffic accident in 2005 at age 27 while returning from chasing Hurricane Dennis. Maintained by his family, the site features chase accounts, videos, images, and weather summaries from Jeff's years of dedicated storm chasing based out of Norman, Oklahoma.