The ravens might have been dying of West Nile virus infection, the researchers suggest. Ravens belong to a family of birds that are particularly susceptible to the pathogen - members of the same family are responsible for the virus' spread across the United States. "
"Epidemiologist John Marr of the Virginia Department of Health in Richmond and infectious-disease expert Charles Calisher of Colorado State University in Fort Collins suggest that the virus may finally have toppled Alexander the Great."
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