Ex nihilo, nihil fit: "Out of nothing, nothing comes."
This is one of oldest truism of human reason. Laurence Krauss thinks he has proven this false, but note how he redefines "nothing" to have substance that can be weighed. This is nonsense. Nothing is no thing. Nothing has no weight, no particles, no anything. Nonsense is still nonsense, even someone with a Ph.D. spouts it.
See "Lawrence Krauss: another physicist with an anti-philosophy complex" by Massimo Pigliucci
See also Dr. R.C. Sproul's lectures:
Saving the Phenomena
Faith and Reason
Chance: the Modern Myth
What is Chance?
"The Necessity of God's Existence".