Black holes are one of nature's greatest enigmas--objects so dense that not even light can escape their pull. Nevertheless, scientists are beginning to gather evidence on many of their fundamental properties: how they form, their role in the formation of galaxies, and why they may be essential components of the universe. It's all found in this intriguing documentary from National Geographic.
51025NMonster Black Holes (DVD)http://oldies.scdn5.secure.raxcdn.com/i/boxart/large/75/727994753506.jpg?v=314.9814.89USDInStock/Genre/Documentaries/Movie Categories/Education-World-History-Culture/Product Groupings/National-Geographic/Sale Items/DVD-Blow-out-SaleNat'l Geographic VidDVDDocumentaries2009-02-09
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