"Adult characters are all the things they've encountered over time. But kids haven't accumulated all the life experience, all the regrets. They tend to be more in the moment, more willing to play, to be joyful."

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The cloning procedure is similar to IVF. The only difference is that the DNA of sperm and egg would be replaced by DNA from an adult cell. What law or principle - secular, humanist, or religious - says that one combination of genetic material in a flask is OK, but another is not?

— Nathan Myhrvold