rachel carson went to jackie kennedy at georgetown and new frontier people and talked about books. when kennedy comes in, he has robert roth do the inaugural, honoring carl sandburg. these were not poets sneaking in. barack obama tried to continue that. he would have a group of historians meet quite frequently, a number of times at the white house, to talk history with president obama. george w. bush reads particularly deeply in texas history. he said his favorites were about the kings ranch. a book about sam houston, and george w. bush became a lincoln reader like barack obama. stephen: the president of harvard also wrote about it in the book. he says it is unusual to quote some of the people in the same speech. the speech was called "the politician and the intellectual." he said the nation's first politicians were also the nation's great writers and scholars. books were their tools, not their enemies. this is his view of the importance of learning and reason in american politics. he was a historian himself. he wrote a good review of the adams papers. he won a pulitzer prize for h

ththese as industrtrial agricululture took k hold in the fifties, sixties, and, really, this is what rachel carson talked about in "silent spring." using all these insecticides was really leading to what she felt was a collapse of biodiversity. we were killing the undernnnning of, uh, , of the food d chain. >> by thehe 1970s, regugulatorse rushing to get these organochlorine pesticides off the market because of their persistencnce in the envnvironmt anand their poible link with birth defects, cancers, eggshell thinning in birds, and other problems. >> along in the late eighties and early nineties, really people started to think, well, we need something that is more targeted. we need chemicals that are not so broadly toxic to everything. and thahat's really where neonicotinoids came frfro. the idea wawas that these chemicals, although highly toxic to insects, are less acutely toxic to mammals, they're less acutely toxic to fish. they also thought, what if we can target them m inside the plant? ? if wn target them inside the plant, this is going to be better, because the animals outside the plant ar

in the summer of 1962, as social change was coming in the u.s., rachel carsons silence ring publish many other events afoot. [inaudible conversations] well -- haflex deriving to wuu38 cell and he create ared 800 of these tiny cells each had two to three million cells in it. each cell in each had the potential to divide another 40 times. if you do the math you realize that simply one little bottle of about ten million cells will produce 22 million pounds of cells or tons rather when it is fully expanded. for practical purposes created a supply of cells that was infinite especially when you realize if you freeze 800 cells an take out one ampuele a decade or 50 years later cells will begin dividing again and they will remember how many times they divide before they were frozen and they'll continue up to roughly 50 divisions to america will use cells today from viles just look this one that they laid down in the srm of 189 -- summer of 1962 excited about the cell and got lab tests that was clear that the cells from mrs. ex-'s fetus were clean and safe, in fact, he sent a young physician back

beautiful. [ cheers and applause ] >> seth: my thanks to rachel maddow, beck bennett, all time low, everybody. josh dion, 8g band. stay tuned for carson yoay, featuring the "white princess" star, jodie comer,

[ cheers and applause ] >> seth: my thanks to rachel maddow, beck bennett, all time low, everybody. josh dion, 8g band. stay tuned for carsonght, deap vally is going to rock the glass house in pomona.