This photo provided by researchers in March 2023, shows the Stumpff Lock, from composer Ludwig van Beethoven, in a laboratory at the Max Planck Institute for the Science of Human History in Germany. Hundreds of years after Beethoven's death, researchers have pulled DNA from strands of his hair — and found clues about what killed him, according to a study published Wednesday March 22, 2023. (Anthi Tiliakou via AP)