The Sun appears to shine at a constant rate. However, its magnetic field is actually constantly changing, and this affects energy output. These variations cause effects that extend throughout the solar system. This...
This NOVA television broadcast discusses black holes and presents new research indicating that a supermassive black hole may lurk at the center of our own galaxy. Features include interviews with researchers who explain...
In spite of the unpredictability of volcanoes, scientists have learned to read the many signs they display prior to an eruption, in the hope of minimizing damage to lives and personal property. This video segment...
Since landing on Mars in January 2004, Spirit and Opportunity, the Mars Exploration Rovers, have helped scientists learn an amazing amount about the red planet. The sophisticated rovers far exceeded expectations with...
During the first of two landings in the Mars Exploration Rover mission, scientists and engineers were full of anticipation and anxiety the night that the rover 'Spirit' was due to land. Would the rover land safely and...
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