Fatto matematico: 752 is the number of conjugacy classes in the automorphism group of the 11 dimensional hypercube.
Trivia: 752 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: January 21st is the day in 1968 that a B-52 bomber crashes near Thule Air Base, contaminating the area after its nuclear payload ruptures.