Stewart Brand: The dawn of de-extinction. Are you ready?
Throughout humankind's history, we've driven species after species extinct: the passenger pigeon, the Eastern mountain lion, the dodo .... But now, says Stewart Brand, we have the technology (and the biology) to bring back species that humanity wiped out. So -- should we? Which ones? He asks a big question whose answer is closer than you may think.
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Sarah Kay: If I Should Have a Daughter ...
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In this 3-minute talk, cartoonist and educator Jok Church tells a moving story of the teacher who cared for him when no one else did -- and how he returned the favor.