Science
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HobbySpace Blog
A blog dedicated to space, astronomy, and exploration, with reports on spaceflight, solar system science, habitats, and…
Holotypic Occlupanid Research Group
A deadpan scientific taxonomy of occlupanids, the plastic clips that seal bread bags, with detailed classification of ty…
Home-Built STM
A detailed build log of a low-cost scanning tunneling microscope made at home, from scan head and vibration isolation to…
Honeysuckle Creek Tracking Station
A detailed history site preserving the story of the Australian tracking station that relayed the first television images…
House Plant Journal
A houseplant blog taking an engineer's approach to the basics of responsible plant parenthood, helping you keep plants h…
How Euler Did It
An archive of Ed Sandifer's MAA column that walks through individual discoveries of Leonhard Euler, explaining the origi…
How Many People Are In Space Right Now
A single-purpose page that answers exactly one delightful question: the current number of humans in space, with names an…
How Products Are Made
An encyclopedia explaining how everyday and unusual products are manufactured, from pencils to pianos, with materials, s…
How the Brain Works
A free online book that explains the brain from the ground up - why it evolved, why it is mostly built for movement, and…
How to Become a GOOD Theoretical Physicist
Gerard 't Hooft's guide for aspiring theoretical physicists, a curated path of topics, books and links to study from the…
Human Brain Project
The public face of a major European neuroscience initiative, sharing digital brain atlases, simulation tools, and resear…
Human Memory
An accessible educational site explaining how memory works, its types and disorders, alongside interactive demonstration…
Humanity's Last Machine
A deep dive on humanoid robotics hardware and the technology shaping our future, exploring how the machines are built an…
Hutter Prize
A cash prize for losslessly compressing a 1GB slice of Wikipedia, arguing that better compression means better intellige…
Hypercubing
A wiki and community hub for higher-dimensional twisty puzzles, covering their history, records, puzzle designs, and sol…
HyperPhysics
A concept-map reference of physics from Georgia State University, linking mechanics, electricity, optics, quantum physic…
IBM 360 Model 20 Rescue and Restoration
The story of friends who spotted an oddly worded eBay listing, then rescued and began restoring a rare IBM System 360 ma…
Iceland Geology
A blog tracking volcano and earthquake activity in Iceland, with updates on eruptions and general notes on the island's…
IEEE Spectrum
The flagship magazine of the IEEE, covering engineering breakthroughs, robotics, semiconductors, and technology policy w…
Ikkaro
A maker and hacker blog of homemade inventions, DIY projects, homemade bots, and science experiments, with engineering c…
Improbable Research
Home of the Ig Nobel Prizes, honoring real research that first makes people laugh and then makes them think, from levita…
iNaturalist
A global network where naturalists share photo observations of plants and animals and crowd-identify millions of species…
Infinite Ascent
A personal blog by CJ Quines, where systematic curiosity meets existential oversharing, with writing on science, the hum…
Information Theory, Inference, and Learning Algorithms
David MacKay's classic textbook, free online in full, linking chapters on entropy, coding, probability and neural networ…
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