Co-author of Mosaic, the first widely used web browser with a graphical user interface. Co-founder of Netscape and general partner of Silicon Valley venture capital firm Andreessen Horowitz. Co-founder of Ning. Net-worth estimated at $1.7 billion by Forbes.

Former investigative reporter at ProPublica and senior writer at Sports Illustrated. Known for specializing in science issues in sports and investigative reporting. Broke the story on Alex Rodriguez testing positive for steroids in 2003.