The Dangerous Side of Evolutionary Change...

[Minimalist]

and no...it isn't that it keeps fundie morons awake at night!

http://www.sciencedaily.com/releases/201...193741.htm

An international team of scientists has discovered that two of the world's most devastating plagues - the plague of Justinian and the Black Death, each responsible for killing as many as half the people in Europe -- were caused by distinct strains of the same pathogen, one that faded out on its own, the other leading to worldwide spread and re-emergence in the late 1800s. These findings suggest a new strain of plague could emerge again in humans in the future.