Physicist and author of "Physics of the Future" Michio Kaku warned world citizens this morning on Good Morning America about the pending threat of enormous earthquakes.
"In our life time, we could very well see one of these cities destroyed," Kaku said. "Los Angeles, San Francisco, Mexico City, Tehran, Tokyo."
Kaku pointed to changes in the physical structures of human civilization, and how the new composure poses many risks. "We are creating mega cities where there used to be fishing villages," he said.
About the many disasters this year, he said: "Well, look at the Chilean earthquake. You realize it was so big it actually rocked the planet earth. The axis of the earth shifted 3 inches as a result of that 8.8 earthquake. The day is no longer 24 hours, it's been shortened by one micro-second, That's how big that earthquake was."