Complex things —
in simple words
Each note explains one topic so anyone can understand. Science, finance, psychology and more.
Latest notes
Science
All notes → The Forgetting Curve: Why Your Brain Deletes Memories
Ebbinghaus, exponential forgetting, and spaced repetition. Why cramming doesn't work — and what does.
ScienceHow Evolution Works
Natural selection, mutations, and adaptation — without the myths. Why evolution has no goal and is happening right now.
HealthHow Stress Works
Cortisol, adrenaline, and the fight-or-flight response. Why acute stress is useful and chronic stress is dangerous.
PsychologyDopamine: Why Your Brain Is Hooked on Scrolling
Dopamine loops, variable reinforcement, and why TikTok is so addictive — the neuroscience of screen addiction.
TechnologyHow AI (Neural Networks) Works
What ChatGPT actually does and how neural networks learn — no math, with an interactive example.
FinanceHow Loans Work
Interest rates, overpayment, and annuity payments — find out how much you'll really pay the bank.