From Airbnb to Lyft, the sharing economy is rewiring the way we interact with each other. In the May issue, Executive Editor Jason Tanz delves into the phenomenon of entrusting strangers with our most valuable possessions, personal experiences - and our very lives. Also this month: an inside look at the algorithms and formulas that Twitter and Facebook use to build the perfect feed, the story of a Silicon Valley startup struggling to survive, and the oral history of Mystery bet365体育赛事 Theater 3000.