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Mainstream science long ignored laughter and even today many questions about the origins function and mechanisms of laughter remain unanswered. what is it that triggers laughter in the brains of primates medical science suggests that there is no single center in the brain responsible for laughter not activates a number of different regions including the brain stem and some more evolved areas of the brain. laughter is not simply a reflex it's a complex neural activity. laughter is a mystery that scientists are still working to because. these scientists on mavericks pioneers they think. the new ...

Specifically in this context of white people, frankly, how they speak to us and learning to take that reaction and sort of interrogate it. >> do we ever get any better in terms of not being driven by fear? and not having fear being the easiest button it is for politicians to push and for, you know, media elites to push in terms of getting people's attention, getting them to believe -- >> that is so -- it is so hard, right, to overcome that because the fear stuff is located in the brain stem. the first part that evolved. then all the other stuff in the prefrontal kor tecorterkxt. here in new yo...

Terms of not being driven by fear? and not having fear being the easiest button it is for politicians to push and for, you know, media elites to push in terms of getting people's attention, getting them to believe -- >> that is so -- it is so hard, right, to overcome that because the fear stuff is located in the brain stem. the first part that evolved. then all the other stuff in the prefrontal cortext. here in new york city there was an election to end stop and frisk which that was overwhelmingly ratified and same echos of fear, crime is going to go right back up. it did not. i think that was...

I mean, i have felt it in my life. many a time. i've felt the siren call that particularly growing up as 12 and 13-year-old in new york city when the crime rate was at a peak amount, so before we talk about, like, criminal justice policy or policing, like, the deeper truth is an emotional truth about how we, as political actors, respond to these appeals. >> yeah. >> and recognizing the way they speak to us, and i mean this specifically in this context of white people, frankly, how they speak to us and learning to take that reaction and sort of interrogate it. >> do we ever get any better in te...

Breathing, hearing, seeing. when that's happening and then you hear the pope is coming in town, you felt the nudge to go see him. tell me about the time. you have this tumor that they're saying the location is threatening the life of your baby. you go to see the pope. what happens? >> gosh. when we heard pope francis was coming to philly, i had a -- i had a dream that she met him and i knew that he had to get her -- his hands on her. it was a miracle. him kissing her. it was a real miracle. her entire life has been miraculous. >> we see that photo of pope francis gising gianna. is he kissing h...