Computer visualisation showing gamma ray signals produced as a result of the annihilation of dark matter particles. The lighter areas show gamma ray signals at higher energies. These gamma ray signals come from the centre of the of the crescent-shaped region on the left. In this simulation dark matter is represented by Weakly Interacting Massive Particles (WIMPS), now viewed to be the leading candidate class for dark matter. When WIMP particles collide into each other, they mutually annihilate and release gamma ray particles. This simulation tells astronomers that there is a signal that gamma ray telescopes may be able to detect in the future.