You look into the mirror, but what you see is not your reflection. It's a friend, a colleague, a doppelganger.
That's what entanglement does to particles. It's like they're stuck together, even when they're on opposite sides of the universe.
It's not just a theory, it's a fact. But don't worry, it's not as weird as it sounds. Or is it?
Want to learn more about this strange, quantum world? Click here to read about the Spooky Action of Quantum Mechanics.
Or, if you're feeling particularly adventurous, click here to learn about Quantum Telepathy.