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Joshua Smith: New nanotech to detect cancer early
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Thordis Elva and Tom Stranger: Our story of rape and reconciliation
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Nagin Cox: What time is it on Mars?
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Sue Klebold: My son was a Columbine shooter. This is my story
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Eduardo Briceño: How to get better at the things you care about
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Alan Smith: Why you should love statistics
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Sarah Parcak: Help discover ancient ruins -- before it's too late
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