We think of antibiotic-resistance as a modern-day problem. Now scientists have evidence that these superbugs have been around for eons. Clues to their origin are offering clues to their defeat.
About 450 million years, animals made one of the most important decisions in Earth's history: They left the wet, nourishing seas and started living on the dry, desolate land.
At that moment, humanity's problems with superbugs probably began.
