An ancient Greek boy, Pythagoras, helps his cousins produce pleasant music when he adjusts the mathematical ratios between the part of their pipes and lyres, knowledge he would later use to become a famous philosopher.

The Vietnam War: A Film by Ken Burns and Lynn Novick : Ken Burns and Lynn Novick's ten-part, 18-hour documentary series, The Vietnam War, tells the epic story of one of the most consequential, divisive, and controversial events in American history as it has never before been told on film. Visceral and immersive, the series explores the human dimensions of the war through revelatory testimony of nearly 80 witnesses from all sides -- Americans who fought...