Sen. Marco Rubio, R-Fla., drew scrutiny when he answered a question about the age of the earth. "I'm not a scientist," he said.

"At the end of the day, I think there are multiple theories out there on how the universe was created, and I think this is a country where people should have the opportunity to teach them all," Rubio said. "I think parents should be able to teach their kids what their faith says, what science says."

New York Times science writer Nicholas Wade wrote about the clash between religion and science in a recent essay.

How can the gap between science and religion be bridged? Comment on the blog.

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