Short of magically sprouting an identical twin sister who would also be sexually available to the young man, obviously it was not.

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They'd had experience with cancer: Gigi and her identical twin sister, Jade, were found to have leukemia shortly after their first birthday.

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Alongside her identical twin sister, Giusti founded the Multiple Myeloma Research Foundation (MMRF) in 1998 in search of more aggressive and accelerated approaches to drug development and perhaps even the discovery of a cure in her lifetime.

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And on the International Space Station, commander Scott Kelly led NASA in a moment of silence for his sister-in-law, Ms. Giffords, who is married to his identical-twin brother.

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