With his many varied interests in technology, politics, and culture, Peter Thiel has often been described as a Renaissance man. So perhaps it was only fitting that we traveled to Florence, Italy—where the Renaissance originated and thrived for hundreds of...

Treatment-resistant typhoid originating mostly from South Asia has springboarded across borders almost 200 times in the past three decades, according to new research that underscores the increasing global threat of infections that can evade antibiotics.