How would time travel affect life as we know it?

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Can your hair turn white overnight?

Can your hair turn white overnight?

Many people think Marie Antoinette's hair turned white overnight. Find out if this could really happen at HowStuffWorks.

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  • ABC Science Online. "The Big Questions: The Riddle of Time." Jan. 17, 2002. (Oct. 7, 2010)
  • Davies, Paul. "How to Build a Time Machine." Penguin Books. 2002.
  • Davies, Paul. Personal interview. Oct. 13, 2010.
  • PBS Nova. "Sagan on Time Travel." October 1999. (Oct. 7, 2010)
  • Pickover, Clifford. "Time: a traveler's guide." Oxford University Press. 1999.