You are an astronaut, traveling through space, but you ran out of fuel and need to get a hold of Houston immediately. How do you do it? You previously gave Houston one of two quantum particles that have been entangled. At the moment of distress you would change one of the particles, so the other would do the same and the distress call would be received.
Is such a system possible? Can we use quantum entanglement to send information instantaneously? If I remember correctly I though there also was a law stating that no information can travel faster than the speed of light. Or maybe I have that idea wrong.