It is the beginning of a historic enterprise.
Mark acquires a certain campus notoriety in the aftermath of his aborted website Harvard Facemash in the winter of 2003.
But there are some perceptive young entrepreneurs who recognise his talent and want to harness it to their own web projects.
In the summer of 2004, Mark moves the team to Silicon Valley, but Eduardo remains behind in New York and Harvard.
A Waters Partnership production for BBC Radio 4.
In summer 2004, Mark moves the team to Silicon Valley, but Eduardo remains behind.
Facebook's users begin to grow exponentially, and so do sums of money and egos.