Scientists say the Black Death 'could happen again'

An international team of researchers has discovered that two of the deadliest pandemics in history, the Plague of Justinian and the Black Plague, were caused by strains of the same plague. They warn that mutated — or even bioengineered — versions of the bacteria could lead to future outbreaks. » 1/28/14 10:39am 1/28/14 10:39am