Oldest evidence of plague outbreak found in prehistoric graves, rewriting the disease’s history​Oldest evidence of plague outbreak found in prehistoric graves, rewriting the disease’s history 

 A new study describes the oldest evidence of a plague outbreak ever found, in a set of skeletons excavated from prehistoric graves in Siberia dating back 5,500 years.  ​​A new study describes the oldest evidence of a plague outbreak ever found, in a set of skeletons excavated from prehistoric graves in Siberia dating back 5,500 years.