Performers carry a giant graffiti ball during the opening Mass of the Kirchentag (Church Day) festival in Berlin, Germany, celebrating the 500th anniversary of the Reformation, on May 24th, 2017.
Before self-driving cars begin appearing on our roadways, we need to ensure that they can cope with the potential hazards of driving alongside other vehicles.
For the month of April we're profiling the individuals who made our inaugural list of the 30 top thinkers under 30, the young men and women we predict will have a serious impact on the social, political, and economic issues we cover every day here at Pacific Standard.