Fredrik Lanner of the Karolinska Institute in Stockholm and his student, Alvaro Plaza Reyes, examine a magnified image of an human embryo they used to attempt to create genetically modified healthy human embryos.
Rob Stein/NPR
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Hosted by the dynamic Lauren Ober, The Big Listen introduces listeners to podcasts they might have never heard of, and gives them the inside scoop on shows and creators they already love.
Kara Frame/NPR
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