From time-travel movies (in graph) to wormhole entanglement, 2013 delivered a load of mind-boggling ideas.
It was also the year that several big experiments delivered the goods we were hoping for: the Planck telescope provided the most accurate map of the big bang's afterglow; the discovery of the Higgs boson was confirmed, winning those who first predicted it the Nobel prize; and neutrinos from outer space were finally glimpsed.
But as attempts to solve a knotty problem known as the black hole paradox reveal, we're in no danger of running out of mysteries quite yet.
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