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://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.
https://realhamradio.com/
K8CU's amateur radio station site features well-documented technical construction projects including high-power GS35B RF amplifiers, HF log periodic antennas, GPS frequency standards, and Six meter equipment. Vintage receiver restoration, mobile RFI solutions, and detailed technical articles make this a rich resource for serious radio amateurs worldwide.
https://nsml.org/
The North Suburban Math League (NSML) organizes competitive math meets for Chicago-area high schools, with five competitions held throughout the school year. The site provides contest archives, meet schedules, written and oral topic lists, coach resources, and a history of NSML alumni who have earned medals at the International Mathematical Olympiad.
https://asliclub.org/
The Astronomical Society of Long Island (ASLI) is an amateur astronomy club that holds weekly meetings at the Vanderbilt Planetarium in Centerport, NY, with Zoom broadcasts available for remote attendees. Visitors can join observing sessions, get telescope advice, and explore the night sky alongside dedicated hobbyist astronomers without needing to own any equipment.
https://sbcb.bioch.ox.ac.uk/users/oliver/home.html
Oliver Beckstein's academic homepage showcases his computational biochemistry research at the intersection of physics and biology, covering topics like ion channel gating, membrane transport proteins, and molecular simulations. Hosted at the University of Oxford's Structural Bioinformatics and Computational Biochemistry Unit, the site links to publications, software, and his lab at Arizona State University's Center for Biological Physics.
https://dbbear.com/k0emt
K0EMT is a well-stocked amateur radio resource from a Missouri ham covering antenna projects, kit building, QRP portable operation, Morse code learning, and POTA activations. Visitors will find detailed build logs, operating aids, equipment tips, and software projects spanning everything from EFHW transformers to DXSpot interfaces.
http://uksmg.org/content/deadband.htm
Written by Palle Preben-Hansen (OZ1RH), this technical article explains how radio amateurs can make long-distance contacts on the 50MHz (Six Meter) band by exploiting meteor scatter propagation even when the band appears dead. It covers meteor trail geometry, shower timing, diurnal and seasonal meteor rate variations, and practical operating techniques, with supporting figures and links to software and IARU procedures.
https://scrrba.org/
The Southern California Repeater and Remote Base Association (SCRRBA) is a volunteer organization that has coordinated amateur radio frequencies across Southern California since 1970, maintaining over 2,400 frequency coordination records. Visitors can find band plans, hotspot radio guidance, open repeater listings, and coordination policies covering frequencies from 29MHz through microwave bands.
http://rockinglweather.com/
The Rocking L Ranch Weather Station is a personal weather monitoring hub located in Nampa, Idaho, run by amateur meteorologist NV6B using a Davis Instruments Vantage Pro 2 Plus system. Visitors can explore live conditions, NEXRAD Doppler radar maps, yearly rainfall totals, webcam feeds, and a 7-day forecast history for the Canyon County area.
https://minnesotasky.tripod.com/
The Steele County Astronomical Society (SCAS) is an Owatonna, Minnesota-based astronomy club affiliated with the Astronomical League, organizing events like Messier Marathons, park viewing nights, and observatory tours. The site lists the club's annual schedule, membership information, and links to the Owatonna Clear Dark Sky Report for planning observation sessions.