Monday Happenings: “Take Back the Night” 4:30 P.M., 101 Collis–Sign making (suggestions: “S.C.U.M.”, “Girl Power”, and “Give me back my night”). 6:30 P.M., Hopkins Center–March against the men who presumably control other nights of the year.

“A Cappolcalypse: The Second Coming” Collis info desk–Tickets go on sale for April 14 event featuring the Tufts Beelzebubs & Jackson Jills ($3 Dartmouth students).

“Regulation of lymphopoiesis in the post-natal thymus” 4 P.M., 658W Borwell–Howard T. Petrie speaks on that topic.

“Tsahal (part one)” (film) 4 P.M., 13 Carpenter–Documentary on Israel’s defence forces, the Tsavah Haganah L’Israel. Part two to be shown on Tuesday. Director Claude Lanzmann focuses on the individual men of the army, in a sense building up rather than painting broad and clumsy historical strokes, and, particularly, on the 1973 Yom Kippur War.

“Politics, Opinions and Public Health” 7:30 P.M., Filene Auditorium (Moore)–Dr. David Satcher, former Surgeon General, speaks. From Satcher’s government bio: “Dr. Satcher wanted to be known as the Surgeon General who listened to the American people and who responded with effective programs.”