Summary: Brooke Gladstone fills in for Leonard Lopate. She speaks with neurologist Oliver Sacks about his work and his research into hallucinations. We’ll find out the true story of an elephant that was electrocuted at the turn of the last century. Director Ciaran O’Reilly and actor Dan Butler discuss “The Weir,” playing at the Irish Rep. And National Geographic’s Jamie Shreeve explains what DNA found in a cave in Siberia tells us about our human roots.
