There's trouble brewing underground and it's no joke; Physicist Michio Kaku says a supervolcano beneath Yellowstone National Park is due to erupt.
There's no way to determine precisely when the explosion will occur but scientists say the ground around the volcano has started to swell, indicating subterranean activity. It was a similar volcano that helped bring an end to the dinosaurs and this one will 'wipe out the United States as we know it', Dr. Kaku says. But Dr. Kaku is also telling people not to panic because the volcano could blow at any moment...within the next one hundred thousand years.
Hear more from Kiran Chetry's interview with Dr. Michio Kaku: