"When Jules Verne published his classic Journey to the Center of the Earth in 1864, practically nothing was known about the Earth's interior. By this time, Charles Darwin had published On the Origin of Species, weather maps had become available, and Maxwell's equations for electromagnetic waves were used. In contrast, views of the Earth's interior did not emerge until well into the 20th century. How did the Earth, which seems so accessible to humans, remain a mystery for such a long time? In this presentation, Professor Ishii discusses challenges and techniques for studying the deep interior, and takes the audience on a modern journey to the center of the Earth. Miaki Ishii, PhD, Professor of Earth and Planetary Sciences, Harvard University, and member of the Harvard Seismology Group."