75,000 years ago, a cataclysmic event occurred that almost wiped out human life. According to a new theory, this event may also have altered the evolution of humankind! This event released more then 3,000 times the energy of Mt. St. Helens, The catastrophic eruption of Toba in Indonesia and its impact, and the strong possibility that another supervolcano may erupt in our lifetime. The Toba eruption caused a severe "population bottleneck" in humans which lead to the extinction of all other branches of our species with the exception of one...the branch that survived Toba and became modern humans. Learn about supervolcanos? What are they? Where they are found? Learn how genetic, geological, and computer studies show that each human today is related to a survivor of Toba. Learn how to prepare for the next supervolcano, which many believe is right here in our own backyard: Yellowstone National Park. Learn why an eruption at Yellowstone could be catastrophic for humanity.