Rock and Mineral en streaming

What is a rock? What is a mineral? How do they form? The answers may not seem like electrifying entertainment, but in the hands of the award-winning Eyewitness science series, the subject seems as bright and vibrant as the Hope diamond. Accompanied by breathtaking photography, award-winning actor Martin Sheen provides some "rock-solid" narration as he recounts the remarkable evolutionary journey of inorganic materials..