1882 Tuberculosis Bacterium Identified: Dr. Robert Koch discovered Mycobacterium tuberculosis, paving the way for modern methods of diagnosing and treating tuberculosis. 1603 James VI of Scotland Becomes James I of England: The crowns of Scotland and England were united under a single monarch, marking the historic Union of the Crowns. 1883 Early Warnings of Krakatoa: … Continue reading This Day in History