How stable is the universe. When will it end. Not for a long time. Quantum theories about stability. we don't know why the Higgs is at the size it is, but standard model theory says it is about right.:-http://www.scientificamerican.com/article.cfm?id=how-the-higgs-boson-might-spell-doom-for-the-universe&WT.mc_id=SA_DD_20130326