"Computers will match us in emotional intelligence, which includes our whole moral system," says inventor and computer scientist Ray Kurzweil.

Purposefulness and self-sacrifice in human life "can never be reduced to a machine," according to this bioethicist.

"Blood samples are sacred," says Carletta Tilousi, a Havasupai Indian, and "a major part of our spiritual, cultural, and religious identity." The tribe was recently involved in a dispute that raised ethical questions about research subjects and the use of genetic material.

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?

Read more of our interview about human embryonic stem cells with Dr. George Daley of Children's Hospital Boston.

David Masci, a senior research fellow at the Pew Forum on Religion & Public Life, discusses religious, ethical, and moral perspectives on lifting federal funding limits on embryonic stem cell research.

Animal research has long been controversial. The medical benefits can be significant, although not always, and opponents argue the benefits are often outweighed by the pain and suffering inflicted on the animal.

Some say that without safeguards it is a slippery slope on the road to genetic surveillance. Others are convinced it will bring many more criminals to justice.

Ben Carson knows a lot about risk. As one of the leading pediatric neurosurgeons in the world, Carson makes life and death decisions nearly every day.

Parents want to do whatever is possible to make their children healthy. But what about going beyond health to enhancement, making kids bigger or smarter or more talented? Science is opening that door in a big way, and many ethicists debate where the line between health and enhancement should be. Kim Lawton has our story.