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Dark Matter
Turns out most of the universe is held together by a mysterious, invisible substance. 
The Dark Matter MysteryIn this video dispatch, see how a cosmic collision provides evidence that dark matter really exists.
Ask the ExpertAstronomer Richard Massey answers your questions about dark matter and other enigmas. 
Video ExtraWhat's wrong with how we normally depict atoms?
Picturing AtomsHear why orbiting electrons drive Neil deGrasse Tyson batty.
Cosmic PerspectiveAccording to Neil deGrasse Tyson, "dark matter" and "dark energy" could just as well be called "without a clue A" and "without a clue B."
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© | Created June 2008 |
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