Notes
All notes grouped by topic.
Science
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.
ScienceHow Vaccines Work
Why a shot helps you not get sick — and how your immune system learns to protect itself. Explained without medical jargon.
ScienceWhy Is the Sky Blue?
Rayleigh scattering in 2 minutes — no formulas, no jargon.
Health
Psychology
Dopamine: Why Your Brain Is Hooked on Scrolling
Dopamine loops, variable reinforcement, and why TikTok is so addictive — the neuroscience of screen addiction.
PsychologyWhy We Believe Fake News
Confirmation bias, the illusory truth effect, and filter bubbles — why the brain gets fooled and how to fight back.
PsychologyThe Anchoring Effect: How the First Number Controls Your Decision
Why a discount from $200 to $100 feels like a better deal than just a $100 price tag — and how numbers are used to manipulate us.
PsychologyProcrastination: Why We Put Off What Matters
Why you scroll your feed instead of working — and what to do about it. The neuroscience of laziness in simple terms.
PsychologyThe Dunning-Kruger Effect
Why beginners are more confident than experts — and how it affects learning.
Technology
How AI (Neural Networks) Works
What ChatGPT actually does and how neural networks learn — no math, with an interactive example.
TechnologyWhat Is Blockchain
Distributed ledger, hashes, and chains of blocks — the technology explained without crypto hype, with an interactive example.
TechnologyHow HTTPS Works
Encryption, certificates, and the padlock in your browser — a 2-minute explanation of how your data is protected online.
TechnologyHow Wi-Fi Works
Radio waves, frequencies, and routers — a formula-free explanation of how your phone gets internet through the air.
Finance
How Loans Work
Interest rates, overpayment, and annuity payments — find out how much you'll really pay the bank.
FinanceInflation: Why Money Loses Value
Why $1,000 today is not the same as $1,000 in 10 years. A simple explanation of inflation.
FinanceCompound Interest: How Money Grows on Its Own
The key principle of wealth building that Einstein reportedly called the eighth wonder of the world.