LiveScience.com – Despite Rumors, Black Hole Factory Will Not Destroy Earth

But at one a second how do they know?  And what happens when their mutual gravitational attraction causes them to join together and make a MUCH bigger one?  SciFi land here I know but they really DON’T know either untill they turn it on.  And this level of experimentation would be much better done on an uninhabited world a few million miles away…