Science
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arXiv.org e-Print archive
Open-access repository of millions of scholarly preprints in physics, mathematics, computer science, and related fields.
Asimov Press
A digital publication of deeply researched essays about biology and biotechnology, readable for laymen while staying inf…
Ask a Mathematician / Ask a Physicist
A long-running Q&A site where working mathematicians and physicists answer reader questions on math and physics in clear…
Ask an Astronaut
Browse hundreds of student questions answered by astronauts aboard the International Space Station, from daily life in o…
AskNature
A searchable library of biomimicry examples showing how plants, animals and ecosystems solve design problems and inspire…
Association for Psychological Science
The site of a major scientific society, publishing research news and observer articles that translate psychological scie…
Asterisk
A quarterly journal of clear writing and clear thinking on big questions, from pandemic prevention to the economics of p…
Astro Bob
Bob King's Astro Bob column covers astronomy for everyone, from Mars and the Milky Way to the northern lights and conste…
Astrobiology
A news site on astrobiology that tracks research on the search for life beyond Earth, exoplanets, and the origins of lif…
Astronomy Now
The online home of the UK's biggest astronomy magazine, with news and features about the cosmos and practical stargazing…
Astronotes
The stellar blog of Armagh Observatory and Planetarium in Northern Ireland, sharing the latest news and views from the w…
AstroNuclPhysics
A science site covering nuclear physics, astrophysics and cosmology, from atoms and radioactivity to accelerators, with…
Athletic Lab Training Info
Research-based articles from a sports performance training center on strength, speed, and conditioning, written for coac…
Atom Central
A film archive of atomic and nuclear test footage, with authentic period reels from the early bomb tests and the Cold Wa…
Atomic Rockets
A sprawling reference on realistic spaceship design for science fiction writers, covering orbital mechanics, nuclear pro…
Attenborough at 100
A searchable archive of nearly 5,000 episodes from David Attenborough's nature documentaries, so you can find the one ab…
Audubon
The National Audubon Society's site covers bird conservation news, species identification guides, and live camera links…
Australian Museum Blog
Writing from the Australian Museum on science, natural history, and culture, with stories behind its collections and res…
Av8n
A site hosting an online aviation physics textbook along with technical essays that explain how and why airplanes fly, w…
Avertipedia
An independent wiki about Paleozoic invertebrates and related research, covering trilobites, brachiopods and other ancie…
Avian Behavior Conservancy
Articles on animal behavior and training, conservation and companion parrot care from the Avian Behavior Conservancy, wr…
Aviastar Helicopters and Rotorcraft
A huge directory of helicopters, autogyros, tilt-rotors and tilt-wings with specs, photos, a recognition guide and size…
Aviation Safety Network
An extensive database of aviation accidents and incidents dating back over a century, used by researchers and enthusiast…
Aviation Stack Exchange
A question-and-answer community where pilots, engineers, and enthusiasts trade detailed technical knowledge about aircra…
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