"What's the use in explaining existence?"Well, at the most basic level, cuz it's ***** cool. But other than that it is sometimes extremely profitable to look into these radical areas of research. Sometimes it is a spin-off technology from the search itself, other times it might give us a new avenue of technological research which could lead to some interesting new technologies. "Does it give you super powers or 80 virgins?"No, but it does help us minimize their political power when we can educate people and show them that the various sky daddies of religion are just superstitious garbage, and that reality is understandable.