Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Mathematics

Bayesian Statistics

Quick fact

Bayes' theorem was discovered by Thomas Bayes in the 18th century, but only gained widespread use in the 20th century when computers made complex calculations practical.

Why this is interesting

You guessed there was a 50% chance of rain, then you saw dark clouds. How should you change your guess? Bayes' rule tells you exactly how to update your beliefs with new evidence.