Facebook turns 5 -- but can it survive?

Facebook turns 5 -- but can it survive?
A Web site started by a student as a way of staying in touch with friends which became a billion-dollar business and a global phenomenon celebrated its fifth birthday Wednesday.
A Letter To Darwin - Here's What Has Happened In The Last 150 Years
Let me introduce myself. I am one of thousands - maybe tens of thousands - of professional biologists who work full time on your scientific legacy. You'll be happy to know that Britain remains a powerhouse in what we nowadays call evolutionary biology, and your ideas now have wide currency across the entire planet.