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.

Technology

Measurement Distortion

Quick fact

In quantum physics, measuring a particle’s position changes its momentum—this is called the observer effect, a form of measurement distortion.

Why this is interesting

Did you know that simply looking at something can change what it does? This is the core of measurement distortion, where observation itself alters reality.