At a recent scientific conference at City College of New York, a student in the audience rose to ask the panelists an unexpected question: "Can you be a good scientist and believe in God?"
Reaction from one of the panelists, all Nobel laureates, was quick and sharp. "No!" declared Herbert A. Hauptman, who shared the chemistry prize in 1985 for his work on the structure of crystals. Belief in the supernatural, especially belief in God, is not only incompatible with good science, he declared, "this kind of belief is damaging to the well-being of the human race."
But disdain for religion is far from universal among scientists. And today, as religious groups challenge scientists in arenas as various as evolution in the classroom, AIDS prevention and stem cell research, scientists who embrace religion are beginning to speak out about their faith.
"It should not be a taboo subject, but frankly it often is in scientific circles," said Francis S. Collins, who directs the National Human Genome Research Institute and who speaks freely about his faith.
Although they embrace religious faith, these scientists also embrace science as it has been defined for centuries. That is, they look to the natural world for explanations of what happens in the natural world and they recognize that scientific ideas must be provisional _ capable of being overturned by evidence from experimentation and observation.
This belief in science sets them apart from those who endorse creationism or its doctrinal cousin, intelligent design, both of which depend on the existence of a supernatural force.
Their belief in God challenges scientists who regard religious belief as little more than magical thinking. Their faith also challenges believers who denounce science as a godless enterprise and scientists as secular elitists contemptuous of God-fearing people.
Some scientists say simply that science and religion are two separate realms, "nonoverlapping magisteria," as the evolutionary biologist Stephen Jay Gould put it in his book Rocks of Ages. In Gould's view, science speaks with authority in the realm of "what the universe is made of (fact) and why does it work this way (theory)" and religion holds sway over "questions of ultimate meaning and moral value."
Collins, who is working on a book about his Christian faith, believes that people should not have to keep religious beliefs and scientific theories strictly separate. He noted that until relatively recently, most scientists were believers. "Isaac Newton wrote a lot more about the Bible than the laws of nature," he said.
According to a much-discussed survey reported in the journal Nature in 1997, 40 percent of biologists, physicists and mathematicians said they believed in God.
Collins said he believes some scientists are unwilling to confront the big questions religion tries to answer. "You will never understand what it means to be a human being through naturalistic observation," he said. "You won't understand why you are here and what the meaning is. Science has no power to address these questions _ and are they not the most important questions we ask ourselves?"