Observer Editor, Free
“The Altruistic Urge”: Literati Bookstore/Ann Arbor District Library.:
U-M psychology professor Stephanie Preston discusses her new book about how neural and psychological mechanisms that evolved to safeguard offspring also motivate people to save strangers in need of immediate aid. 6 p.m., AADL Downtown, 343 S. Fifth Ave. Free. 585–5567., . . . . . .