On Friday, I was down in Washington to speak at (and mostly watch) TEDxExtinction, a day-long meeting dedicated to exploring the possibility (and advisability) of bringing extinct species back into existence. The meeting coincided with the publication my story in the new issue of National Geographic on the subject. I invited readers to ask questions raised by either the story or the meeting, and then on Monday, National Geographic hosted a tweet chat on Twitter, which became an hour-long rapid-fire volley. So I’m only now getting a chance to write this long-promised post. Here are some answers to a few of the questions posted on the Loom and on Twitter–first on the logistics of de-extinction, and then the ethics.

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