Question

could The LHC make an earth - killing black hole,?????

Answer 1

There is, I believe, in every disposition a tendency to some particular evil, a natural defect, which not even the best education can overcome.”
“And your defect is a propensity to hate everybody.”
“And yours… is wilfully to misunderstand them.” -Jane Austen

Every time we push the frontiers of knowledge, it comes with a risk, and it comes with the prospect of a reward. The risks are many: failure to find anything new, futility of the experiment to function as designed, and even the possibility of damage and destruction if things go awry. But the rewards can be tremendous, including the unlocking of new knowledge, the development of new technologies, and the advancement of the entire human enterprise of science.