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://stormandsky.com/
Storm And Sky is a storm photography and weather resource featuring hundreds of photos of supercell storms, tornadoes, and other dramatic natural phenomena. Visitors can explore trip reports, tutorials, gear recommendations, stock images, and weather and space data, making it a destination for storm chasers and weather enthusiasts alike.
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/svr/home.rxml
Part of the University of Illinois WW2010 online meteorology project, this module covers severe storms in depth using the NOAA Severe Storms Spotters Guide as its foundation. Visitors can explore thunderstorm types, tornado formation, updrafts and downdrafts, and even computer modeling of supercells and squall lines through a well-structured educational guide.
https://pglpm.github.io/Pinference
Pinference is an R package by PierGianLuca Porta Mana that implements probability inference for propositional logic, calculating lower and upper probability bounds for logical expressions using Hailperin's procedure. The documentation site covers the theoretical foundations connecting probability calculus to sequent calculus, with worked examples and an API reference for the inferP() function.
https://500kc.com/
The 500 KC Amateur Radio Experimental Group, run by Ralph M. Hartwell II, documents the WD2XSH experimental station network operating in the 600-meter (500 kHz) band, including reception reports, station maps, frequency assignments, and FCC regulatory updates. A fascinating resource for low-frequency amateur radio enthusiasts, it captures the years-long effort by American hams to secure the new 630-meter band allocation from the FCC.
https://rain-tree.com/plist.htm
Created by Leslie Taylor, this extensive tropical plant database catalogs hundreds of Amazonian medicinal plants by common name, botanical name, ethnic uses, and healing properties. A leader in rainforest plant research since 1995, the site offers deep reference content including preparation methods, disease applications, and articles distinguishing herbs from drugs.
http://ee.cleversoul.com/
The EE Compendium is a comprehensive reference hub for electronics engineers, students, and hobbyists covering microcontrollers, embedded systems programming, and hardware development tools. Visitors will find curated links and resources spanning popular platforms like Atmel AVR, Microchip PIC, Intel 8051, and Freescale chips, along with project kits, robotics, software compilers, and career resources.
https://socalcontestclub.org/
The Southern California Contest Club, established in 1976, is the official web presence for a Southern California amateur radio contesting group, featuring a full calendar of upcoming ham radio contests including ARRL, CQ WPX, NAQP, and many other events. Visitors will find contest schedules, club information, and resources aimed at SoCal operators who participate in competitive radio contesting.
http://warac.org/
The West Allis Radio Amateur Club (W9FK) is a Wisconsin-based ham radio organization that sponsors the Wisconsin QSO Party and the David Knaus Memorial Scholarship. Visitors can find club news, event information, and resources for amateur radio enthusiasts in the greater Milwaukee area.
https://in-the-sky.org/
Created by Dominic Ford, In-The-Sky.org is a richly detailed astronomy portal offering real-time night sky guides, interactive planetarium tools, satellite tracking, and event calendars for celestial phenomena like eclipses, conjunctions, and meteor showers. Visitors can explore 3D solar system maps, rising and setting times for planets, deep sky object catalogs, and even printable planispheres and astrolabes, all tailored to their geographic location.
https://jrm.phys.ksu.edu/Scouts/Space-AstroLinks.html
Compiled by Vincent Needham at Kansas State University, this extensive link directory covers virtually every corner of space and astronomy on the web, from advocacy groups and industry players to SETI projects and digital sky surveys. With over 270 curated links organized into categories like amateur rocketry, space missions past and future, telescopes, and planetary science, it serves as a thorough reference hub for space enthusiasts and researchers alike.