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

Oscillators

Quick fact

The most accurate oscillator in the world is an atomic clock, which uses the oscillation of cesium atoms to keep time to within one second over millions of years.

Why this is interesting

You've seen a pendulum swing, a guitar string vibrate, and a heart beat – what do they have in common? They are all oscillators, systems that move back and forth around a central point, and their rhythm is the secret behind everything from timekeeping to wireless communication.