From a pinch of soil, an innovative technique has uncovered a type of antibiotics that have a unique molecular structure, what researchers call a new class of antibiotics. In laboratory experiments, the antibiotics, called malacidins, killed several multidrug-resistant bacteria, including Methicillin-resistant Staphylococcus aureus (MRSA) skin infections on mice. Finding new drugs to treat life-threatening antibiotic-resistant bacteria is…