Human beings are responsible for high concentrations of Duh Matter. It's similar to Dark Matter, only more dense. Top scientists from around the galaxy have determined that the Duh Matter emanating from our solar system is responsible for the precipitous drop in Galactic IQ levels. They also say that studying our internet chatter makes them dumber by the second. At least, we think that's what they said. We were too busy watching fail videos to know for sure.