Research interests: My recent research interests involve
(1)Cosmology (the nature of the dark energy that is causing the Universe to accelerate, using precision measurements of the anisotropy of the cosmic microwave background to probe inflation and fundamental physics, theoretical aspects of inflation and quintessence, eschatology of the Universe) and
(2)Strong field tests of gravitation (Was Einstein really right?) and
(3)Astrophysical limits on time variation of fundamental constants
Prize: The Yukawa-Kimura Prize of 2011