anything that has buttons on it i'm not supposed to be close to. >> is my microphone on you? there is a guy named ian stevenson who did a little historical study and asked, how many neurons has it been possible for scientists to track every given year between 1960 and now. he went through literature and found out that the number of neurons that can be individually watched in the brain is doubling about every seven years. that is now being called stevenson's law. an obvious analogy to moore's law. , computing power doubles every 18 months. stevenson's law, the number of trackable neurons doubles every seven years. right now, those numbers are fairly low. it's possible to track now

somewhere between 60-200 neurons simultaneously in the brain. in that order of magnitude, dozens, hundreds. every seven years, that number doubles by 2040, 2050, it may be tens of to track thousands of neurons in the brain. we would have a much richer understanding of what actually goes on in the brain during devastating disorders like parkinson's, epilepsy and actually be able to treat them. >> thank you all very much. we have reached the time limit. thanks for coming. please give a warm welcome -- thank you to our panelists. [applause] [applause] "newsmakers" kansas senator jerry moran cherry of the national republican senatorial committee talks about -- 2014 election landscape. see it again at 6:00 p.m. eastern on c-span.

>> there will be very different impacts, depending on you are in the affordable care act. averages will not tell the story. the young young and healthy will see big increases. our survey says 200%, their number, or 197. sharp premium increases. for others they will get relative decreases as a result of the regulatory framework. on just don't want to rely an average. there is not a single number that will tell you the story about the aca implementation. some people are going to get quite a bit of impact and others a lot less. >> this weekend on c-span, the impact of the new health care law on insurance premiums. sunday night at 9:00 eastern. also this weekend on c-span twos book tv, pulitzer prize-winning author rick atkinson takes your questions on "in-depth." on american history tv on c-

span3 our weekly look at the presidency of george h w bush and german reunification. sunday at 7:30. of this year's commencement speeches by business leaders from around the country. we begin with twitter ceo take cost alone -- dick costolo. then writer and statistician nate silver at the new school in new york. , apple cofounder steve wozniak at the university of california berkeley. later, new york stock exchange atduncan near our -- colgate university. dick costolo give this year's commencement address. before his career, he was a stand up comedian that worked in improv theater. this is just over 15 minutes.

[applause] >> i love you, too. you know i have to start by tweeting this. give me a second. i'm a professional. this only take a second. [laughter] all right. i want to start by thanking the school's president and the students and faculty and the board of regents who sit behind me and quietly judge us all. i would also like to thank my mother and father who are here today. and i would like all of you to remember at the end of the day to take a moment to thank your parents or whoever it was that help you get where you are today. they have sacrificed greatly for you and we will be out of here by 3:30 p.m., i promise. [laughter] when i woke up this morning and started writing my speech --

[laughter] i was thinking of my first month on campus when i was a freshman. our football was ranked number one. there is all this excitement on campus. our first game was in wisconsin and we went up there and lost our first game. 21-14. there was crushing disappointment. i would like you to think about that expectation followed by crushing disappointment as a metaphor for your next 20 minutes with me. [laughter] when i was sitting where you were many years ago but was seem to me like it was yesterday, i was earning my degree in computer science. [cheers and applause] yay, nerd. [laughter]

at the time, i had to have a certain number of art credits to graduate. my first semester of senior year, i decided to take an acting class. [cheers and applause] i'm going to pander to the crowd. [laughter] i thought i would take an acting class because we would not have a lot of homework. we will say a few lines to each other and i could work on the operating system program device. and i loved the class so much that my second semester of senior year, i took another acting class. i started doing standup comedy, which i had never done before. by the time i was sitting where you are today, i had offers from

two technology companies to work with them as a programmer, but i decided what i would do is move to chicago and try to get into the improv comedy groups and go on from there to rise to fame and glory. [laughter] in the hollywood version of the story, what happened is there would be three minutes where i would move to chicago and suffer at night or in the rain and there is music in the background and i would come home to a dog in a giant loft that i could somehow miraculously afford and asleep.leep.-- fall after those three minutes, i would be discovered by director who would cast me in a film and walk on the red carpet and my parents would give me the thumbs up. in the real world story of what happened when i decided to make a big bet on myself and take that chance to do this because it is what i loved, i was grinding away for a long time and i had no money. we would rehearse during the day and perform these little theaters at night for free.

i was taking classes during the day and trying to learn improvisation. i eventually had to get out because i had no money. i put my degree from michigan to use rather than selling stuff at crate and barrel. [laughter] i kept on improvising in chicago for many years. two lessons i learned -- we had this director that was instructing a class. 10 of us in the class. the guys are improvising that they are in a laundry mat. the scene ends. he asks all of us, what do you see on stage right now? there is nothing up there. it is an empty stage.

he says, so far you guys have improvise you are in an apartment, a laundromat, and apartment. what are you afraid of? we looked at each other. what do you mean? he said, you need to make more courageous choices. even if the stages completely empty, you can go out there and be in a keebler elf factory be an astronaut on the space shuttle. take courageous risk. a few months later, i was studying with another legendary director. steve carell was out on stage. he was improvising something and i thought of this amazing line. i thought, i have to get this line out. i get to the stage and i start to try moving the seat in the direction of what i wanted to say. he stops the scene. he says, you cannot plan a

script. the beauty of improvisation is your experience in it in the moment. if you try to plan what the next line is supposed to be, you're going to be disappointed when the other people on stage with you do not do or say what you want them to and you'll stand there frozen. be in this moment. be here in this moment. i continued to stay in chicago and improvise for many years. i got auditions for shows and got none of them. fortunately during this time, the internet happened. that was great. i know it is funny to you. when i was your age, we do not have the internet in our pants.

[laughter] we didn't even have it not in our pants. that's how bad it was. i know i sound like my grandfather. we did not have teeth. [laughter] what was i talking about? the internet. i dove into the internet because it was the structure that had these amazing possibilities. i created a sequence of companies over the course of the next 20 years that led me to twitter. if there is ever an example of the importance of making and focusing on what you love, it is twitter.

when jack dorsey talks about the origins of his thinking for the product, he talks about his fascination with maps and his ultimate fascination with dispatch systems and more efficient way to get taxis and ambulances for where they need to go. when he sent out his first tweet, he did not plan for president obama to declare victory on the platform and the 2012 election. none of us thought that our service would be a great alternative communication service if the mobile networks are spotty in the aftermath. we did not know that someone would use it to organize protests. here's the amazing thing about what i have observed.

not only can you not plan the impact you are going to have come you often will recognize it even when you're having it. a few months after being with twitter, the streets were completely blocked off. the u.s. secret service was there and russian security forces were there. it was a crazy scene walking into the building. i remember going into the metal detector to get into our office,

which were there just for the day. there had these crazy uniforms and german shepherds that look like they could kill you. there is a huge buildup. the russian president came in with his entourage. there are reporters and cameras behind him. he was going to send his first tweet from the office to the world. they were taking a tour of the office before sending the first tweet. being the thoughtful and charismatic leader i was, i said, it is, totally down? totally down. the next day, you guys and the rest of the world read president obama welcoming the russian president to twitter and declared we may not need the red phone anymore because we could use twitter.

it is always like that. the impact is what others frame for you and the world after it happens. the president is only what you are experiencing and focused on right now. every so often my past and present come together. i was invited to this fundraiser at a children's hospital in the bay area last year. steve carell was there. i showed the photos to him when i got a chance to talk with him.