The 9.0 magnitude Tohoku earthquake and tsunami which devastated Japan on March 11th, 2011 is being reported as one of the five most powerful earthquakes since seismological records began being kept in 1900. The awesome destructive power of our constantly changing world is highlighted by these kinds of disasters on a fairly regular basis, but does the understanding of when and how these events may happen change the way humans are choosing to live on dangerous planet earth? This week on Skepticality, Swoopy talks with Dr. Donald R. Prothero, professor of geology at Occidental College in Los Angeles and a lecturer in geobiology at Caltech about his new book Catastrophes! Earthquakes, Tsunamis, Tornadoes, and other Earth-Shattering Disasters which discusses not only the dangers we face from geographical challenges but also those that affect us all: overpopulation and global climate change.