DVD Features:
Region 0
Keep Case
Letterboxed - Anamorphic - 1.85
Audio:
Dolby Digital 2.0 - English
Interactive Features:
Interactive Menus
Scene Access
DVD-Rom Features:
Printable Materials for Educators
Access to the Magnetic Storm Web Site
Scientists have researched the causes and effects of the Earth's magnetic field, and recently have wondered why it has weakened in the last few decades. NOVA takes a look at the elements of the field, from the molten core to the far reaches of space, to find some answers.