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1. Harvard University, United States
2. University of Cambridge, United Kingdom
3. Yale University, United States
4. UCL (University College London)
5. IMPERIAL College, London
6. University of OXFORD, United Kingdom
7. University of CHICAGO, United States
8. PRINCETON University, United States
9. Massachusetts Institue of Technology (mit), United States
10. Calfornia Institute of Technology (Caltech)
11. Columbia University, United States
12. University of Pennsylvania, United States
13. Johns Hopkins University, United States
14. Duke University, United States
15. Cornell University, United States
16. Stanford University, United States
17. Australian National University
18. Mcgill University, Canada
19. University of Michigan, United States
20. ETH Zurich (Swiss Federal Institute of Technology)
