Aya Virginie Toure
As thousands of people flee the violence in Ivory Coast, we hear an impassioned plea for help from women's leader Aya Virginie Toure. She organised the recent protest march in Abidjan during which seven women were shot dead.
The San Francisco Chronicle science editor has had a career at the paper spanning seven decades. David Perlman tells us how he first fell in love with science, and why he still relishes the challenges of his job at the age of 92.