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.

Physics

Feynman Diagrams

Quick fact

Feynman originally created these diagrams to help himself think, but they were so effective that they became the universal language of particle physics—despite initial resistance from some colleagues who saw them as too informal.

Why this is interesting

You've likely seen squiggly lines and arrows connecting particle dots—but what do these drawings actually represent? Feynman diagrams turn impossibly complex quantum math into simple sketches.