Bacillus anthracis - anthrax - had largely faded from public consciousness until it resurfaced as a terrorist weapon in 2001. It was always with us, lurking in the soil and hosted by our livestock. Long before it was identified as a specific bacterium in the late 1800s, anthrax was a catchphrase for a variety of diseases and symptoms, from ancient biblical plagues to a painful carbuncle on George Washington's leg. Only when industrialization turned anthrax into a widespread disease that threatened economies did a true understanding of Bacillus anthracis begin to emerge. This history of...