"In the 1990s, scientists lived inside Biosphere 2 (Biosphere 1 is the Earth itself) for two years, trying to figure out if colonizing Mars would ever be possible. Now scientists don't live there but instead conduct all sorts of studies and experiments aimed to help us better understand our environment and especially understand what sort of things are happening to it due to climate change and other man-made problems. It's a unique take on the Scientists...

An account of the work of volcanologists Andy Lockhart, John Pallister, and their team describes their life-risking efforts to investigate dangerous volcanoes that pose threats to more than one billion people worldwide.