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Raj, what did you think as one of the authors of this fascinating study, what are the big takeaways that you get out of it? >> so the basic fact from this study is that there's a great deal of variation within the u.s. in rates of upward income mobility. so traditionally people often perceive the u.s. as the land of opportunity. as you were saying, recently people have become concerned that upward mobility is declining in the u.s. relative to other countries. what we're showing in this study is actually you should think about the u.s. very differently. there are some places that are in fact la...

Billions of phone calls and e-mails and internet searches. the feds aren't monitoring every last one, but they could easily, and that is the essence of the age of big data. in their excellent book, "big data," they write about the police in richmond, virginia. they track criminal incidents against a variety of events. corporate paydays, sports events, concerts, gun shows and dozens of other possible triggers. and the computer then identifies patterns. for example, two weeks after a gun show, there is always a jump in violent crime. now, multiply this example by thousands and you understand wha...

Data allowed you to actually figure out -- allowed people to figure out where flus were breaking. >> yes, indeed. think back at the h1n1 flu crisis we had and the centers for disease control in atlanta and the united states wanted to find out where the flu was and they asked doctors to report every flu case, but by the time they had collected all the nvltion, calculated it, two weeks went by and that's an eternity if you have a pandemic at hand. google at that time thought they could do better. just by looking at what people searched for online. >> so the words would be something like -- >> wh...

Together to create a portrait like this. >> talk to me, i was just going to say, talk to me about the science behind it. how you do this. >> sure. it's really building on information that is all sort of publicly available in science right now. so, i'm just drawing on research papers, things that people have published that link specific base pairs within the dna to specific traits. so, a lot of this information draws on association studies, which are just ways of looking at lots and lots of dna, lots and lots of people's dna. looking at the traits they have and creating correlations between the...

In the nutty socialist guy. the french voted him in so they get what they deserve. >> bill, what about england though, bill. england did just the opposite. they instiewlted they have a conservative fiscal policy they are not getting out of their mess either. the answer isn't extremism on either side. you need to be more moderate and reasonable like me, bill. >> bill: i know you ared the poster boy for moderate and reasonable. open the dictionary and there is is hill's face. do you know why jesus was killed by the romans? >> i'm going to let you answer that question. i will get in trouble. what...