Photo: Crusades, Islam Expansion Traced in Lebanon DNA

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An 1840 oil painting shows Crusaders (right) accepting the surrender of Tyre in modern-day Lebanon in A.D. 1124.

Scientists say they have found traces of Crusader DNA in Lebanon's Christian populations, as well as traces of DNA mirroring the expansion of Islam from the Arabian Peninsula in the country's Muslim populations.

Photograph by Alexandre-Francois Caminade/Getty

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