Saved on this device

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

Quantum Entanglement and Nonlocality in Particle Physics

Quick fact

In 2022, the Nobel Prize in Physics was awarded to Alain Aspect, John Clauser, and Anton Zeilinger for experiments that proved quantum entanglement is real and that the universe does not obey local realism—Einstein's 'spooky action at a distance' is actually a fact of nature.

Why this is interesting

Imagine two coins that always land on opposite sides, no matter how far apart they are tossed. But these coins don't decide until you look at one—and then the other instantly 'knows'. How can that be?