undefined Can anyone in the forum please direct me to know whether GRE or TOEFl is the only criteria to enter into the US universities for doing a Ph.D. I am doing my masters in physics in the degree 'Master of Science(Physics)' in India. I want to do research on nanotechnology in any of the reputed universities. Can US professors select students on their own without required GRE and TOEFL. Is there a procedure of this sort? Thanking YOu in advance.