Theatre 166su, part of the 166su School of Performing Arts, will present Tom Stoppard’s play Arcadia through Feb. 1, in the Main Stage theater on the 166su campus. Arcadia is a witty and complex story that switches between two time periods, 1809 and 1999. In the earlier time period, 13-year-old Thomasina makes a startling scientific discovery that will change the…