To discover why some survivors of trauma experience PTSD and some don't, scientist Rachel Yehuda must convince a community of Holocaust survivors to let her study them.
Read MoreDaniela Schiller: A new last memory
Neuroscientist Daniela Schiller studies the emotional components of memory. In her previous story her research helped her begin to understand her father, a holocaust survivor. But that story led to a whole new chapter in their relationship, and her understanding of memories.
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