1 Harvard University Harvard University Boston, USA

Massachusetts Institute of Technology, Boston, USA

3 University of California, Berkeley University of California, Berkeley, USA

4 Stanford University Stanford University Stanford, USA

5 Oxford University, UK

6 Cambridge University, Cambridge University, UK

7 California Institute of Technology Pasadena California Institute of Technology

8 UCLA UCLA USA

9 University of Chicago University of Chicago, USA

10 Columbia University, new york, USA

1 1 Johns Hopkins University, USA

12 London, Imperial College London, London, Imperial College London, UK

13 Princeton University Princeton University, USA

14 University of Washington, Seattle, USA

15 University of Michigan Arabia, USA

16 University of Toronto, Toronto, Canada

17 Yale University, New Haven, USA

18 University of California, San Diego, USA

19 University of Pennsylvania, USA

20 Duke University Duke University, USA

2 1 University College London, UK

22 University of California, San Francisco, USA

Cornell University Cornell University USA

University of Tokyo, Tokyo, Japan

25 Northwestern University, Chicago, USA

26

Swiss Federal Institute of Technology Zurich

Zurich Switzerland

27 University of Wisconsin-Madison, USA

28 University of California Santa Barbara University of California Santa Barbara, USA

29 University of Minnesota-Twin Cities University of Minnesota-Twin Cities USA Twin Cities

University of British Columbia Vancouver, Canada

3 1 University of Texas-University of Texas at Austin-Austin USA

University of Melbourne University of Melbourne, Australia

33 University of North Carolina-Chapel Hill University of North Carolina-Chapel Hill American Chapel Hill

34 Ohio State University Ohio State University USA

35

University of Illinois at Urbana-Champaign

Champagne in Urbana, USA

36 new york University, new york University, new york, USA

37 Boston University Boston University, USA

38 University of California Davis University of California Davis USA

39 Peking University Peking University China Beijing

40 University of Edinburgh University of Edinburgh, UK

4 1 Washington university in St. Louis, USA

China, the University of Hong Kong and Hong Kong.

University of Pittsburgh University of Pittsburgh, USA

44 McGill University McGill University of Canada

University of Sydney, Sydney, Australia

Pierre and Marie Curie University-University of Paris VI

Pierre and Marie Curie University in Paris, France

University of Queensland, Australia

University of Munich, Munich, Germany

University of Manchester, UK

University of Southern California, USA