pinker argued angels are less cool than any in existence. dr. pinker is joining me.ou heard in my commentary, what gut reaction do you have to what i just said? >> well, basic interest of it, stories drive events, it's called the availability bias. the more quickly you can recall an image, anecdote, narrative from memory, the more common you think it is. that's just the way the human mind works. and so our perception of risk and danger is driven by horrible images like shark attacks. great for me here in cape cod, i can get a spot at the beach. but then the actual dangers of falling off ladders and car crashes are far higher than getting eaten by a shark or being shot in a rampage shooting. >> so what does the data show? i had wished to bring to the cnn audience this morning a good overview of the data. and frankly much of what i was reading as a lay person seemed contradict contrary. it showed that violence is up in some cities but i'd rather rely on your just. how do you read those tea leaves? >> well, it looks -- and you say we're not going to get the data from th

is it really necessary to pinker fi science to get girls interested in stem why do women still make up less than 30 percent of scientists globally. i want to understand where the gender gap in science comes from there appear to be many reasons. you know the old what do you think it means you can't be. really can you really do all that. talking to christina a common cliché crops up girls are just not naturally into science and tech. but a recent study showed that a lot of girls actually do love science at least at 1st but then their interest wanes. why is that. kristina things that has to do with how science is presented in society as a subject that is really hard and basically suited to man. what you grew up in. what you grew up with such knowledge you would eventually not want to pursue science subjects because you were already of the mind that very hard what christina describes is known as a stereotype threat for example if someone makes you believe you're bad at math you actually will be. here you are trying to reach your dreams and then somebody else comes in and questions it just