Amazon founder and CEO Jeff Bezos became the richest person in history Monday. His net-worth eclipsed 105.1 billion dollars, after Amazon shares climbed 1.4 percent. Microsoft founder Bill Gates , the previous record-holder, saw his net-worth pass 100 billion in 1999. It is now around 91.9 billion dollars. But both mega-billionaires live in the tiny waterfront city of Medina, Washington, which is located just outside of Seattle. <br />