Albert Einstein formulated the special and general theories of relativity, fundamentally transforming physics and our understanding of space, time, and gravity. His equation E=mc² revealed the equivalence of mass and energy, and his work on the photoelectric effect won him the 1921 Nobel Prize in Physics.

Johann Strauss I was the founder of the Strauss musical dynasty and is often credited as one of the most important popularizers of the waltz. His most famous composition is the Radetzky March, which remains a beloved piece of the classical concert repertoire.

Paul Ehrlich was a pioneering physician and scientist who made fundamental contributions to hematology, immunology, and chemotherapy. He developed Salvarsan, the first effective treatment for syphilis, and his concept of the 'magic bullet' — a drug that would kill pathogens without harming the patient — laid the conceptual foundation for modern pharmacology.

John Luther 'Casey' Jones became an American folk hero after he died on April 30, 1900, in a train crash near Vaughan, Mississippi, staying at the controls to slow the train and saving his passengers at the cost of his own life. A popular ballad immortalized his name.