 But we hope that the Large Hadron Collider will one day allow us to calculate and detect the higher resonances, higher octaves of the string. And we think that's dark matter. Dark matter is a substance that has not been found yet in the laboratory. We know it exists out there in the galaxy. But we think that dark matter could be the next vibration of tiny vibrating strings. Okay, let's move on to the next listener phone call.