Summary: Live on location at the Cambridge Science Centre, Chris Smith, Dave Ansell, Ginny Smith and guests James Jackson, an Earth Scientist, Tehnuka Ilanko, a volcanologist, and Arwen Deuss, a seismologist, pit their wits against the assembled public as they tackle the extreme Earth. Plus Dave and Ginny make a flame tornado, a volcanic crater and explain why acid rain can be so damaging...
