Researchers in China studying pandas have discovered a peptide with antibacterial properties in panda blood. The compound, cathelicidin-AM, destroys bacteria in an hour, compared with the more than six hours needed by other antibiotics. This isn't the first time antibacterial peptides have been identified in animals. "More than 1,000 antimicrobial peptides have been found from animals, plants and microorganisms," said lead researcher Xiuwen Yan. The findings may lead to new antibiotics for humans.