The University of Oxford has become the first British university to top the Times Higher Education's global league table, knocking the California Institute of Technology into second place. Oxford topped the list because it improved across the four main indicators that influence the rankings - teaching, research, citations and international outlook, Times Higher Education said. But Britain's vote to leave the European Union could threaten the oldest university in the English-speaking world, locking academics out of research projects, said Phil Baty, the editor of the rankings. Here is the list of top 10 Universities of the world: