unfolds daily. in 1979, c-span was created as a service by america's cable television companies and is brought to you today by your cable or satellite provider. >> about seven years ago, i wrote my first book and i was so excited. i spent all this time picking up the title and the title i came up with with was what is health? to me, it was the key question. i didn't know what health was. was it how long you live, how well you live? what was health? how do you optimize on a parameter if you don't have a parameter on which to optimize? a week later, the publisher called and said david, she said just change the title of your book. i said what? i called up and i said what

are you doing? he said david, you can't put the word health in the title. it's a bad word in our country. as soon as you say health, people's eyes glaze over. when you say health, people think of brussels sprouts. he said you need something optimistic. declarative. he came up with the title the end of illness. this was what steve was occluding to, this quote from mark twain. i'm going to offend some of you, take away things you've been leaning on and show you there's little data behind them. i'm going to push you but these are my opinions, these are data and i'm going to show you the data about the things we do and where i think we should be going going forward. our country is about being bigger and better.

but if i take a seven-year-old and give him a shot of growth hormone, his friend says you look like 1 million bucks, 10 years younger, it works. it makes you look better, feel better. on average, it takes 16 year better today. so the question is what is your metric? do you want to look good today or play with your grandchildren tomorrow? there's a population in ecuador that are short stature and having mutation in the human court growth receptor. there is no diabetes in that population. so the key thing is, identifying each of you what you want your goal to be. the other topic is, we hear on the radio every day so in the largest study done looking at people and giving them testosterone, they found

something interesting. when they did that they found no increase in muscle mass, libido , but a high increase in cardiovascular offense and death. by the way, is a bad side effect of the drug. so again, i challenge you if whenever you do something, and send a resounding message over and over is asked why and use the data of what we're doing because there were over 200 million prescriptions written last year quite you can watch this and other programs online at booktv.org. >> this is book tv on c-span2. here's our primetime lineup. at seven, chelsea clinton examines the public-private partnerships working on global healthcare .

then at eight, a roger packard calls the extradition of jonathan robbins to britain for his involvement in a mutiny aboard the british ship hms hermione in 1877. and on afterwords at 9 pm eastern, sylvia tara discusses the history and science behind body fat. at 10, don't we discusses his book game of bourns which looks at why the clinton campaign lost the 2016 presidential election. the winning strategy of the trump campaign and president trumps plan to move america forward and to wrap up our sunday primetime lineup at 11:15, journalist and civil rights attorney ali a malik talks about the lives and struggles of a selection of people, muslims, christians, jews and kurds were living in her grandmother's apartment building . >> battle happens tonight on c-span2's book tv. >>.

>> this is henrietta left it looking at, i want to get this magnificent image. was looking at images taken from south america. because the whole sky had to be covered, there was a observatory building in peru, just photographing the stars of the southern hemisphere and she was looking at images of the transatlantic clouds and she discovered 12,000 variable stars and made a fundamental discovery about thpattern of variation that the stars that took the longest time to go through their cycles tended to be the brigest stars. and all of the stars she was looking at roughly the same distance away so the ones that were brighter, really were brighter. that led to the first usable

yardstick in measuring what we would call now the lactic distance and intergalactic distances in space. and her work and able the size of the milky way to be determined, maybe getting ahead of the slides here. >> they figured out but milky way was not the only galaxy in the universe, the universe in fact consisted of multiple galaxies. >> it would be fair to say at that time we weren't sure if the universe was a few hundred thousandlight-years across , maybe that was it. >> and in the shape of the universe, this led to us looking at what geometry of globular clusters and spiral galaxies and then to place ourselves within that geometry. >> watch this and other programs online at booktv.org. >>.

>> book tv takes hundreds of author programs on your long. look at some of the programs will be coming this week. monday we will be at the seattle publ library with camille discusses for essays on gender equality. wednesday we will be at the women's national republican club in new york where biographer craig shirley will discuss ronald reagan's 1976, 1980 residential campaigns. thursday we had back to the capital where the chair of the museum of american finance, richard silva will discuss the life of alexander hamilton and hamilton's role in developing the american banking system. also this weekend we will be harvard where john foster will examine the costs of mass incarceration. on friday we're at literati bookstore in ann arbor journalist kevin davis will discuss the growing use of

neuroscience and criminal defense cases. also that evening a stop at oblong books and music in new york where former deputy chief and staff alyssa mathematical will discuss your experience within the white house. wrapping up the week on saturday we will be live at the virginia festival of books in charlottesville, our coverage includes a panel discussion on nuclear war with authors karen stilson and dan ask any discussion on the media moderated by white house correspondent kate ryan and washington post senior editor mark fisher and bureau chief frank with no. >> to look at some of the programs tv will be covering this week. many of the events are open to the public, listen in the near future on book tv on c-span2.>> next on afterwords, council on foreign relations president bridges off examines changes this