Extra Sites Library
Linas JuozėnasShare
The Spark / Living library
The Spark
Places to Explore
Good places to learn something, build something, or discover someone whose work makes you want to begin.
A personal collection of learning spaces, useful tools, and creative people. Follow a question, discover a new interest, or simply see where your curiosity takes you.
A small studio of my own
Creators’ Corner
Linas Juozėnas
A home for my writing, creative projects, reflections on healing and understanding, and the work growing around the Knowledge Ark. Get to know me, spend some time with the diary, or help the next ideas take shape.
For now, this is my corner. Unofficially, it’s mission control.
Meet me & explore my work →Learn & explore
Lessons, languages, useful tools, and places to think. Start with what interests you; you do not need a complete plan before you begin.
A → ZEasy to find, from A to Z.
Boot.dev
A hands-on route into backend programming, computer science, and developer tools. For people who want to write code, solve problems, and understand what happens behind the interface.
Brilliant
Explore mathematics, science, programming, and problem-solving through interactive lessons. A place to try an idea, make a mistake, and work out why the next attempt makes more sense.
ChatGPT
A companion for explanations, writing, coding, translation, and planning. Ask for examples, test its suggestions, and check important facts against reliable sources. Curiosity helps; so does a little skepticism.
Coursera
Courses from universities and companies, with structured paths through professional and academic subjects. Useful when you want a syllabus to follow rather than another collection of open tabs.
Duolingo
Short language lessons that make it easier to begin and return regularly. Use the habit as a starting point, then give the language somewhere to live: a conversation, a book, a film.
Khan Academy
Clear lessons and practice in mathematics, science, economics, computing, and more. A welcoming place to strengthen the foundations, whether you are starting out or filling in a few gaps.
LinkedIn Learning
Video courses in business, technology, design, and working life. Explore a particular skill, work through a learning path, or find a practical answer to something your next project needs.
Lumosity
Short games built around memory, attention, speed, and problem-solving. Enjoy them as a puzzle break, not as a replacement for learning something you care about.
Nebula
A streaming home for independent creators, with videos, original productions, and thoughtful explorations of science, culture, technology, and more. For the evenings when you would rather follow an idea.
Penzu
An online journal for thoughts, memories, plans, and the things you are still trying to put into words. A place to write for yourself, without needing to turn every thought into a public post.
A small practical note: this section mixes free resources with services that may offer paid courses, subscriptions, or extra features. Check what is included before you commit.
Go deeper & build
More practice, more substance, and tools for turning an interest into a skill. These are places to spend time with a subject, not only read its introduction.
A → ZEasy to find, from A to Z.
Codecademy
Guided practice in programming, web development, data, and other technical subjects. Useful when you want to try code in the browser and see what your changes actually do.
freeCodeCamp
Programming lessons, challenges, projects, and technical articles. A practical starting point for turning “I would like to learn to code” into something you can actually run.
GitHub Learn
Practice the skills that help people build software together. Work with repositories, pull requests, automation, and the workflows behind collaborative projects.
OpenStax
Free textbooks for a more substantial course of study. For students, teachers, and independent learners who want to move beyond a quick explanation and spend time with the subject.
Saylor University
Self-paced courses across academic and professional subjects. Choose a subject, work through the material in your own time, and build your understanding one lesson at a time.
The Odin Project
A free, open-source path through full-stack web development. Work through the foundations and build projects along the way, rather than only watching someone else write the code.
Windows into Other Worlds
Landscapes, clouds, natural textures, and photographs that invite a slower look. A quiet place in the collection, for the moments when another image says more than another explanation.
WolframAlpha
Explore calculations, equations, units, and structured questions in mathematics and science. Especially useful when your question needs a computation, not just a page that mentions the same words.
Spark Creators & Builders
Follow the things that interest you—technology, science, art, stories, or a clever idea worth trying. Meet the people and teams behind them, explore their work, and find a little inspiration for your own.
A → ZChoose a field, then explore the names A–Z within it. Different interests, no rankings.
Technology, energy & transport
Explore the teams turning ambitious ideas into rockets, vehicles, energy systems, and the infrastructure around them.
Elon Musk
Related work: SpaceX
Explore the teams and projects associated with Elon Musk: rockets and satellite internet, electric vehicles and energy, artificial intelligence, brain–computer interfaces, and tunneling. Several directions, with a separate door into each.
More to explore (4)
Wang Chuanfu
Related work: BYD
From batteries and vehicles to electronics and rail transport, explore the world of BYD and its founder, Wang Chuanfu. Discover the teams and manufacturing systems that turn ambitious ideas into technology at industrial scale.
More to explore (2)
Computing, AI & analysis
Look inside the digital world—from chips and computer hardware to artificial intelligence, graphics, and the questions behind new tools.
Asianometry
Essays and analysis on semiconductors, industry, economics, and Asian history. Follow the connections between a technical detail, the people who developed it, and the world it helped shape.
Linus Tech Tips
Related work: Linus Media Group
Computer hardware, ambitious builds, reviews, and the wider Linus Media Group production world. Follow the main channel, explore the testing work at LTT Labs, or branch out into related shows, community spaces, and projects.
More to explore (6)
Sam Altman
Related work: OpenAI
Writing about technology, startups, progress, and the choices surrounding artificial intelligence. Read Sam’s essays or explore OpenAI and ChatGPT, then bring your own questions to the promises and trade-offs.
Two Minute Papers
Károly Zsolnai-Fehér’s research explanations, graphics work, rendering course, and small open-source renderer. Watch an idea take shape, then explore the papers and code behind the pictures.
More to explore (1)
Engineering & making
Follow an idea from the first sketch to the working machine. Explore robots, electronics, workshops, factories, and the ingenuity that brings them to life.
ElectroBOOM
Electrical explanations, projects, and a memorable amount of comedy. Learn from the demonstrations; leave hazardous electrical experiments to people with the training and equipment to handle them safely.
Factory Monster
Factory visits and production processes, with attention to the tools, machines, and people behind everyday objects. A satisfying answer to the question: how do they actually make that?
James Bruton
Related work: XRobots
Robotics, mechanical experiments, electronics, and ideas that become moving machines. Watch the builds, then explore the shared CAD files and code when you want to understand more than the finished result.
Mark Rober
Related work: CrunchLabs
Engineering videos, hands-on learning, and projects designed to make experimentation irresistible. Explore CrunchLabs and related education projects, plus the collaborative Team Trees, Team Seas, and Team Water campaigns.
More to explore (3)
Real Engineering
Related work: Throttle Media
Engineering and science explainers that look beyond what a machine does to ask why it was designed that way. Watch the videos, explore the Nebula channel, or visit the Throttle Media studio behind the work.
Stuff Made Here
Inventive machines, engineering experiments, and ambitious problem-solving. For anyone who sees a perfectly adequate solution and wonders whether it could involve a robot instead.
Xyla Foxlin
Engineering, aviation, hands-on builds, and creative technical projects. Explore work that brings design, making, and storytelling together rather than asking them to stay in separate boxes.
Science, space & discovery
From a curious everyday effect to the far reaches of space, follow experiments, questions, and explanations that invite you to look again.
Everyday Astronaut
Rocket explainers, launch information, and articles about spaceflight. For anyone who has watched a launch and then wanted to understand considerably more than “the fire comes out of that end.”
More to explore (2)
Isaac Arthur
Related work: Science & Futurism with Isaac Arthur
Long-form explorations of space, future technology, and the possibilities of civilization. Bring your curiosity; the time scales may be slightly larger than your weekend plans.
NileRed
Chemistry videos that connect theory with unusual transformations and a clear sense of purpose. Watch the process, ask why it works, and leave hazardous chemistry to properly equipped laboratories.
Physics Girl
Dianna Cowern’s home for physical-science videos, experiments, demonstrations, and talks. A reminder that a carefully observed everyday phenomenon can lead to a surprisingly interesting question.
Plasma Channel
Jay Bowles’s work with plasma, high-voltage physics, and electrical demonstrations. A striking look at what electricity can do, best enjoyed with curiosity and respect for the hazards involved.
Sabine Hossenfelder
Research, books, and science communication, with an interest in what the evidence does and does not establish. A useful place to encounter questions about the claims surrounding new scientific developments.
Sciencephile the AI
Science, cosmic questions, and a deliberately artificial deadpan delivery. For those who enjoy their explanations with a little absurdity and an occasional reminder that the universe is not obliged to be reassuring.
Tibees
Toby Hendy’s thoughtful science videos and creative book projects, with room for mathematics, physics, astronomy, and the history of ideas. Gentle curiosity, without requiring the universe to become any less strange.
Veritasium
Science and engineering videos built around experiments, demonstrations, interviews, and questions worth examining. A place to test an intuition rather than simply collect another answer.
More to explore (1)
Learning, books & ideas
Find a new question, a thoughtful read, or a different way to explain something. These paths bring learning, conversation, and shared projects together.
Bill Gates
Related work: Gates Notes
Writing, books, philanthropy, and energy projects connected to Bill Gates. Start with Gates Notes, then follow the ideas into the work of the Gates Foundation and Breakthrough Energy.
Hank & John Green
Related work: Complexly
Books, podcasts, educational shows, community projects, and the wider Nerdfighter world. A collection of work that moves between serious questions, shared curiosity, and finding useful things to do together.
More to explore (2)
Sal Khan
Related work: Khan Academy
Learning projects connected to Sal Khan: Khan Academy’s lessons, Schoolhouse.world’s peer tutoring, and Khan Lab School’s approach to education. Different ways to help people learn, practice, and grow.
Tom Scott
Interesting places, surprising systems, careful explanations, and the pleasure of asking a question you had not thought to ask. Explore the videos, the Lateral podcast, and the collaborative comedy of The Technical Difficulties.
More to explore (1)
Art, design & storytelling
Explore places imagined, stories lived, and worlds brought to life through music, film, architecture, and performance. A little room for a different way of seeing.
DamiLee
Architecture, design resources, and book recommendations. A place to look more closely at the spaces we build, the choices behind them, and the ways they influence everyday life.
More to explore (1)
Katy Perry
Music, performance, color, and the craft of building a memorable pop world. Explore the videos, catch up on the news, discover the concert film, or browse the official shop.
Melodysheep
John D. Boswell’s science-inspired films, music, and visual storytelling. A place where cosmic scale, careful sound, and imagination turn a subject into something you can feel as well as think about.
Natasha’s Adventures
Stories about travel, culture, everyday life, and finding a way through change. Explore Natasha’s videos, personal updates, and the community supporting her work.
Sixtwotwo 六二二同学
Character-driven videos, cosplay, and visual performance. A different workshop for creativity, where costume, expression, movement, and presentation become parts of the same idea.
Games, humor & digital life
Follow a strategy, laugh at a broken rule, or learn to spot a scam. Clever thinking has a place in play—and in knowing when not to play along.
Kitboga
Scam-awareness videos, live streams, and creative ways to waste a scammer’s time instead of a victim’s savings. Explore the shows and the projects created to help people recognize and avoid fraud.
The Spiffing Brit
Game-breaking experiments, unlikely strategies, and an enthusiastic search for whatever the rules forgot to forbid. The games are, naturally, perfectly balanced. The evidence may suggest otherwise.
WintergamingTV
Real-time strategy, city builders, 4X, and grand-strategy commentary. Planning, adapting, and occasionally discovering that the beautifully organized plan has met another player.
These worlds often overlap. Start wherever something catches your interest, then follow the projects, stories, and ideas that make you want to stay a little longer.
Make the library useful.
You do not need to explore everything here. Choose something that meets you where you are, and give it enough attention to become more than a bookmark.
1. Start with a real question.
Rebuilding the basics? Try Khan Academy or OpenStax . Want to build a website? Explore The Odin Project . Choose a resource to match the thing you want to understand or make.
2. Give one thing a fair try.
Choose a lesson, a small project, or a subject. Set aside a manageable amount of time and return to it for a week. One finished lesson beats ten newly opened tabs.
3. Leave yourself something.
A page of notes, a solved problem, a small program, a sketch, or a paragraph in a new language. Make something you can return to and recognise as your own progress.
4. Come back with the next question.
When you need a different explanation, a new tool, or a little inspiration, return to the collection. It is a shelf to revisit, not a checklist to finish.
Stay curious. Make a start. Let the work grow.