now to human dna, siddhartha mukherjee awarded the nonfiction prize the emperor of formalities was an inquiry that had clinical and personal. he has done it again the tells the story of genetics with the social history of a personal narrative. he was so physically and mentally exhausted after emperor she did god expect to write another book but it was a natural paring with the prequel with that biological normalcy. and to ever wonder how much of our lives depend john dexter of parks down to expect a simple answer it is complicated. as far back that was a couple decades ago he kid distinguish and self then went to harvard medical school with a professor at columbia at university and to me n conversation this evening the:editor and managing editor of the pbs news hour please join me to welcome siddhartha mukherjee and judy. [applause] >> thanks for that creches introduction -- gracious introduction. if you read a the emperor of all morality issue will be more than fascinated by "the gene." i feel like my microphone is a little bit louder. there are so many ways with like to begin but th