A curated collection of intellectual annotations, practical guides, and reflections on science, economics, and everyday useful topics.
Discover if good deeds done for selfish motives have moral value. Explore the philosophical debate between consequentialism (results matter) and deontology (intention matters), and why the answer changes your view on charity, volunteering, and altruism.
Discover why glass lets light through while wood blocks it and metal reflects it. The answer involves quantum mechanics, energy gaps, and how electrons interact with photons.
Discover why your clothes, sand, and stones look darker when wet. The answer involves light physics, diffuse vs. specular reflection, and how your brain interprets what you see.
Discover why it seems we find many dinosaur fossils when fossilization is extremely rare. The answer involves 165 million years, perception bias, and the brutal mathematics of extinction.
A practical, straightforward guide to choosing a smartphone without drowning in specs
Learn how to create and use a memory palace to memorize anything — from grocery lists to complex exams
Learn how to apply the scientific method from scratch: observation, hypothesis, experiment, and conclusion. A practical guide with real examples to finally understand it.