What's more powerful, a mouse or the sun? According to Czech composer Bohuslav Martinu in his 20th-century ballet "Who Is the Most Powerful in the World," the answer is a mouse. The Prague Symphony ...

In the 1936 short Allegretto, diamond and oval shapes in primary colors perform a sensual, upbeat ballet to the music of composer Ralph Rainger. The geometric dance is set against a background of ...