CNN Fareed Zakaria GPS March 8, 2015 17:35:00
We normally save the quiz portion of the show until the end but i wanted to give you a pop quiz right now. the question is this. there are about 2 billion children in the world today. in 85 years, in the year 2100, will there be 4 billion children, 3 billion children, or 2 billion children? the same number of children that are there today. my next guest hans rosling is a professor at the karolinsk institute in sweden. he's known around the world for his dazzling presentations about the world. from health, which is his specialty, to demographics, to education, to money. i caught his talk at dav...