Contrary to the popular understanding, the natural sciences are not morally neutral. Not only do the findings of science have moral implications, the actual work of scientific research presupposes that the researcher himself is a man of virtue.

Drugs that reshape our character could become the defining industrial products of the century.

Today, the Pope Pius V University in Rome will be the setting for a day-long conference with the arresting title, The Scientific Impossibility of Evolution.

Mitochondria are small, elongated structures in a cell that produce energy.

Father Copernicus seems to have been so self-effacing that he was not considered well-known enough for a marked grave. He did not change the world as Christ did, but he changed the way the world is understood.

Human pregnancy begins whenever a sperm unites with an egg inside the fallopian tube.

Human beings naturally recoil at the prospect of pain and suffering.

When I give talks on stem cell research or in vitro fertilization, people invariably ask, "What should be done with all the frozen embryos?"

Last month, President Barack Obama quietly disbanded the President's Council on Bioethics, a deliberative body whose changing cast of erudite and ideologically diverse members had spent the past eight years thinking through today's toughest moral questions.

A new documentary shows why we need to "stem" the tide of embryo-destructive stem-cell research.