AMHERST, Mass.  Creationism is growing in the Muslim world, from Turkey to Pakistan to Indonesia, international academics said last month as they gathered here to discuss the topic.

But, they said, young-Earth creationists, who believe God created the universe, Earth and life just a few thousand years ago, are rare, if not nonexistent.

One reason is that although the Koran, the holy text of Islam, says the universe was created in six days, the next line adds that a day, in this instance, is metaphorical: “a thousand years of your reckoning.”

By contrast, some Christian creationists find in the Bible a strict chronology that requires a 6,000-year-old Earth and thus object not only to evolution but also to much of modern geology and cosmology, which say the Earth and the universe are billions of years old.