In the brave new world of social media, says communication professor Stephen O'Leary, church authorities from pastors to the heads of denominations "no longer have the kind of control they once did."

At Manhattan High School for Girls, students are learning what Jewish law teaches about gossip, rumors, and evil speech.

Author and consultant Rushworth Kidder says there can be unintended ethical consequences when people use powerful new social media without "a moral compass."

Is the promise of direct-to-consumer genetic testing being oversold? What ethical and policy concerns are raised by selling gene tests directly to the public?

At Manhattan High School for Girls, students are learning what Jewish law teaches about gossip, rumors, and evil speech.

"Spirituality has always had a virtual aspect to it," says anthropology professor Tom Boellsdorff. "People in Second Life can pray and do all kinds of things and find it completely spiritually fulfilling."

"You can’t say that religious opinions made over 1, 000 years ago are valid for all times," says Gamal al-Banna, a reformist Muslim cleric in Egypt. "We must have a revolution in the understanding of Islam, a revolution almost like Martin Luther’s."