Many US Nobel Prize winners immigrants

They live in different places, work at different universities and dedicate their careers to studying different topics. But there's one thing at least four of this year's US Nobel Prize laureates share.

Why the universe shouldn't exist at all

"Why is there something, rather than nothing?" could be the oldest and deepest question in all of metaphysics. Long exclusively the province of philosophy, in recent years this question has become one that can be addressed by scientific methods.