Bacteria have been battling viruses for billions of years, evolving ingenious defense systems that may now hold the key to human antiviral strategies. Credit: Shutterstock For billions of years, bacteria have fought an unending battle with viruses, developing a wide range of survival strategies. Now, scientists say these age-old microbial defenses could inspire new antiviral tools for humans. Thomas Wood, a professor of chemical engineering at Penn State, and his team have uncovered a long-