Is it ethical to use stem cells?

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Can twins sense each other?

Can twins sense each other?

We love stories of twins who can sense each other's pain or know what the other is thinking. But can twins really sense each other? Find out.

Related HowStuffWorks Articles


  • "Ethics of Stem Cell Research." Stanford Encyclopedia of Philosophy. April 25, 2008. (July 12, 2010)
  • Guenin, Louis. "The Ethics of Human Embryonic Stem Cell Research." International Society for Stem Cell Research." Feb. 2, 2005. (July 12, 2010)
  • Sandel, Michael J. "Embryo Ethics -- The Moral Logic of Stem Cell Research." New England Journal of Medicine. July 15, 2004. (July 12, 2010)
  • "Stem Cell Basics." National Institutes of Health. (July 12, 2010)
  • Wade, Nicholas. "Stem cells, with ethics." New York Times. October 16, 2005. (July 12, 2010)
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