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National Wildlife Polar bears and Global Warming NWF's senior scientist Doug Inkley, Ph.D. explains why polar bears need sea ice and what can happen to them because of global warming.
NASA TV Find out more about our Planet Earth click here
Vampire Power Fear-mongering isn't our style, but in this Hallow-green segment, we welcome you to be afraid -- very afraid -- of the hidden powers lurking in your home. Don't fall prey to unnecessary electrical ...
