Ancient brew masters tapped antibiotic secrets

A chemical analysis of the bones of ancient Nubians shows that they were regularly consuming tetracycline, most likely in their beer. The finding is the strongest evidence yet that the art of making antibiotics, which officially dates to the discovery of penicillin in 1928, was common practice nearly 2,000 years ago. The Emory University study finds that it's likely this prehistoric population was using empirical evidence to develop therapeutic agents.