This NOVA television broadcast examines the rare 'supertwister', an extreme tornado classed F4 or F5 on the Fujita scale. Two storms are discussed: the 1999 Oklahoma City tornado (F5) and the 2002 LaPlata, Maryland...
People have long wondered about the existence of worlds outside of our solar system. Since 1995, significant progress has been made in the search for extrasolar planets, mostly gas giants the size of Uranus or larger,...
This video explores the role of biogeochemical cycles in the formation of caves. It discusses a radical new theory that identifies sulfuric acid as a cave-forming agent. The video, adapted from a NOVA broadcast,...
This video segment, adapted from a NOVA broadcast, shows how the members of an Antarctic research team cope with the inhospitable climate and other environmental hazards during their stay. The segment is five minutes...
Most planetary scientists expected that lunar samples brought to back to Earth by the six Apollo missions would confirm one of three leading hypotheses of the Moon's origin. Instead, the samples left all three...
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