The life-changing moment that bonded Mark Zuckerberg with one of his investors, who urged him not to sell Facebook (FB)

Marc Andreessen is the cofounder of Andreessen Horowitz, one of Silicon Valley's most prolific venture capital firms. One of the biggest investments Marc Andreessen has ever made may very well be Facebook. According to a New Yorker profile, Marc Andreessen became a valuable mentor to Facebook's Mark Zuckerberg in 2006, when Yahoo made a bid to buy Facebook for $1 billion. At the time, Facebook's lead investor, Accel Partners, told 22-year-old Mark Zuckerberg to accept the offer and sell to Yahoo...