He obtained his PhD degree in cosmology in March 1966 , and his essay entitled `` Singularities and the Geometry of Space-Time '' shared top honours with one by Penrose to win that year 's prestigious Adams Prize .
[ 78 ] He obtained his PhD degree in cosmology in March 1966 , [ 149 ] and his essay entitled `` Singularities and the Geometry of Space-Time '' shared top honours with one by Penrose to win that year 's prestigious Adams Prize .