Good beliefs update with evidence
Bayesian thinking means adjusting confidence when new evidence arrives—not switching between absolute certainty and doubt.
Build a mind you’re proud of.
Daily Science learning cards
Ideas that explain our world. Explore a short explanation, an everyday example and a question you can answer from memory.
The Science collection currently has 8 written cards. The daily app introduces written ideas and revisits earlier cards once the collection is complete. Source previews offer additional reading.
Correlation is a clue, not a cause
Two things can move together without one producing the other.
A useful claim must risk being wrong
A scientific claim should make predictions that evidence could, in principle, contradict.
Heat spreads unless work is done
Entropy describes how energy spreads and how many microscopic arrangements can produce the same overall state.
Human intuition is poor at huge scales
We understand differences like ten versus twenty, but struggle to feel the gap between a million and a billion.
Extreme results often move toward average
Regression to the mean occurs when an unusually high or low measurement is followed by one closer to typical.
Sleep is part of learning
Learning does not end when practice stops; sleep helps stabilise and reorganise new memories.
Simple rules can create complex behaviour
Emergence occurs when interactions among simple parts produce a pattern that no single part controls.