Everything that can happen, does. That's quantum mechanics. But this does not mean everything happens. The rest of physics is about describing what can happen and what can't.
Antony Garrett LisiWhat physics tells us is that everything comes down to geometry and the interactions of elementary particles. And things can happen only if these interactions are perfectly balanced.
Antony Garrett LisiI think the universe is pure geometry - basically, a beautiful shape twisting around and dancing over space-time.
Antony Garrett Lisi