jared diamond joins me now from our studios in los angeles welcome. how are you i am i am well thank you i hope the same is true of you you brilliantly flaky you brilliantly merge science and culture in a way that the average person can understand is reading your reading or writing what stimulated your earliest interest in these areas. preps the different interests of my parents. was a pianist she was also a great linguist and a teacher and i got my look of writing from her my father was a physician and a experimenter so i got my local science from him but i began birdwatching when i was seven years old and then i grew up during world war two with maps of europe in the pacific on the wall on pins to show the changes in battle and so i became interested early and saw in some one hand and in writing in history in the humanities on the other hand it's an extraordinary synthesis and the breadth of your work is is remarkable your second book why sex is fun evolution of human sexuality seems in some ways out of sync with the rest of your books in some ways