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By Elizabeth Goldbaum, Live Science

A 1,500-year-old parchment could be one of the oldest known copies of the Quran, possibly dating back to a time that overlapped with the life of the Prophet Muhammad, according to researchers who recently dated the manuscript fragments.

The text underwent radiocarbon dating, which measured the age of the find's organic materials. Researchers at the University of Birmingham, in the United Kingdom, found that the leaves of parchment date back to A.D. 568 and A.D. 645.

"The radiocarbon dating has delivered an exciting result, which contributes significantly to our understanding of the earliest written copies of the Quran," Susan Worrall, director of special collections at the University of Birmingham, said in a statement. [The Holy Land: 7 Amazing Archaeological Finds]

The recently radiocarbon dated copy of the 7th-century Quran at the University of Birmingham.Cadbury Research Library, University of Birmingham

The Prophet Muhammad is thought to have lived between A.D. 570 and A.D. 632, and according to Muslim tradition, he received the revelations that make up the Quran between A.D. 610 and A.D. 632. The divine message was not written at that time, though. "Instead, the revelations were preserved in the 'memories of men,'" said David Thomas and Nadir Dinshaw, both religious professors at the University of Birmingham.

The radiocarbon dates from the parchment indicate that the animal that provided the parchment lived during or right after the lifetime of Muhammad. "This means that the parts of the Quran that are written on the parchment can, with a degree of confidence, be dated to less than two decades after Muhammad's death," Thomas and Dinshaw said.

The parchment likely came from the skin of a calf, goat or sheep, the researchers said. The skin would have been first cleaned of any hair or flesh and then stretched on a wooden frame. As the skin is stretched, the parchment maker scrapes the surface with a curved knife, wets the skin and dries it in rotation several times to bring the parchment to an ideal thickness and tightness.

Researchers dated the parchment by measuring the radioactive decay of carbon-14, a common way to determine the age of ancient papers and parchments. Carbon isotopes, or carbon atoms of varying weight, float around in relatively constant proportions in Earth's atmosphere, and all living things have the same ratio of stable carbon to radioactive carbon-14. When an organism dies, the radioactive carbon decays at predictable rates over time, which means researchers can examine the remaining levels of carbon-14 to make age estimates.

This is a condensed version of a report from Live Science. Read the full report. Elizabeth Goldbaum is on Twitter. Follow Live Science @livescience, Facebook & Google+.

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