Double Trouble

When identical twins are not identical

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John Horgan, who has written for Scientific American since 1986, comments on science on his free online journal Cross-Check. He has also posted his books Mind-Body Problems and My Quantum Experiment online. Horgan teaches at Stevens Institute of Technology.

More by John Horgan

This article was originally published with the title “Double Trouble” in Scientific American Magazine Vol. 263 No. 6 (December 1990), p. 25
doi:10.1038/scientificamerican1290-25

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